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Finding the Fourth Proportional to 451,239.40, 676,859.10 and 425,434.60

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Solution

The fourth proportional to 451,239.40, 676,859.10 and 425,434.60 is: 638,151.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,239.40 : 676,859.10 = 425,434.60 : x
  2. Step 2: Convert to fraction form
    451,239.40/676,859.10 = 425,434.60/x
  3. Step 3: Cross multiply
    451,239.40x = 676,859.10 × 425,434.60
  4. Step 4: Simplify right side
    451,239.40x = 287,959,280,464.86
  5. Step 5: Solve for x
    x = 287,959,280,464.86/451,239.40
  6. Step 6: Final answer
    x = 638,151.90

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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.