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Finding the Fourth Proportional to 647,066.70, 970,600.05 and 423,117.90

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Solution

The fourth proportional to 647,066.70, 970,600.05 and 423,117.90 is: 634,676.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,066.70 : 970,600.05 = 423,117.90 : x
  2. Step 2: Convert to fraction form
    647,066.70/970,600.05 = 423,117.90/x
  3. Step 3: Cross multiply
    647,066.70x = 970,600.05 × 423,117.90
  4. Step 4: Simplify right side
    647,066.70x = 410,678,254,895.90
  5. Step 5: Solve for x
    x = 410,678,254,895.90/647,066.70
  6. Step 6: Final answer
    x = 634,676.85

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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.