Home / 640,977,421.20-961,466,131.80-634,174,976.40

Finding the Fourth Proportional to 640,977,421.20, 961,466,131.80 and 634,174,976.40

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Solution

The fourth proportional to 640,977,421.20, 961,466,131.80 and 634,174,976.40 is: 951,262,464.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,977,421.20 : 961,466,131.80 = 634,174,976.40 : x
  2. Step 2: Convert to fraction form
    640,977,421.20/961,466,131.80 = 634,174,976.40/x
  3. Step 3: Cross multiply
    640,977,421.20x = 961,466,131.80 × 634,174,976.40
  4. Step 4: Simplify right side
    640,977,421.20x = 609,737,761,443,664,256
  5. Step 5: Solve for x
    x = 609,737,761,443,664,256/640,977,421.20
  6. Step 6: Final answer
    x = 951,262,464.60

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Double scale
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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.