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Finding the Fourth Proportional to 538,915.20, 807,854.40 and 418,905.60

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Solution

The fourth proportional to 538,915.20, 807,854.40 and 418,905.60 is: 627,955.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,915.20 : 807,854.40 = 418,905.60 : x
  2. Step 2: Convert to fraction form
    538,915.20/807,854.40 = 418,905.60/x
  3. Step 3: Cross multiply
    538,915.20x = 807,854.40 × 418,905.60
  4. Step 4: Simplify right side
    538,915.20x = 338,414,732,144.64
  5. Step 5: Solve for x
    x = 338,414,732,144.64/538,915.20
  6. Step 6: Final answer
    x = 627,955.44

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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.