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Finding the Fourth Proportional to 521,339.28, 781,450.02 and 341,356.47

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Solution

The fourth proportional to 521,339.28, 781,450.02 and 341,356.47 is: 511,668.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,339.28 : 781,450.02 = 341,356.47 : x
  2. Step 2: Convert to fraction form
    521,339.28/781,450.02 = 341,356.47/x
  3. Step 3: Cross multiply
    521,339.28x = 781,450.02 × 341,356.47
  4. Step 4: Simplify right side
    521,339.28x = 266,753,020,308.63
  5. Step 5: Solve for x
    x = 266,753,020,308.63/521,339.28
  6. Step 6: Final answer
    x = 511,668.75

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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.