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Finding the Fourth Proportional to 538,885.20, 807,809.40 and 418,875.60

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Solution

The fourth proportional to 538,885.20, 807,809.40 and 418,875.60 is: 627,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,885.20 : 807,809.40 = 418,875.60 : x
  2. Step 2: Convert to fraction form
    538,885.20/807,809.40 = 418,875.60/x
  3. Step 3: Cross multiply
    538,885.20x = 807,809.40 × 418,875.60
  4. Step 4: Simplify right side
    538,885.20x = 338,371,647,110.64
  5. Step 5: Solve for x
    x = 338,371,647,110.64/538,885.20
  6. Step 6: Final answer
    x = 627,910.45

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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.