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Finding the Fourth Proportional to 538,920.70, 807,862.65 and 418,911.10

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Solution

The fourth proportional to 538,920.70, 807,862.65 and 418,911.10 is: 627,963.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,920.70 : 807,862.65 = 418,911.10 : x
  2. Step 2: Convert to fraction form
    538,920.70/807,862.65 = 418,911.10/x
  3. Step 3: Cross multiply
    538,920.70x = 807,862.65 × 418,911.10
  4. Step 4: Simplify right side
    538,920.70x = 338,422,631,360.42
  5. Step 5: Solve for x
    x = 338,422,631,360.42/538,920.70
  6. Step 6: Final answer
    x = 627,963.69

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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.