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Finding the Fourth Proportional to 640,977,425.70, 961,466,138.55 and 634,174,980.90

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Solution

The fourth proportional to 640,977,425.70, 961,466,138.55 and 634,174,980.90 is: 951,262,471.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,977,425.70 : 961,466,138.55 = 634,174,980.90 : x
  2. Step 2: Convert to fraction form
    640,977,425.70/961,466,138.55 = 634,174,980.90/x
  3. Step 3: Cross multiply
    640,977,425.70x = 961,466,138.55 × 634,174,980.90
  4. Step 4: Simplify right side
    640,977,425.70x = 609,737,770,050,942,976
  5. Step 5: Solve for x
    x = 609,737,770,050,942,976/640,977,425.70
  6. Step 6: Final answer
    x = 951,262,471.35

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Half scale
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Double scale
Find fourth proportional to 640,977,426.70, 961,466,140.05 and 634,174,981.90
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.