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Finding the Fourth Proportional to 534,865.48, 738,005.28 and 316,978.11

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Solution

The fourth proportional to 534,865.48, 738,005.28 and 316,978.11 is: 437,365.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,865.48 : 738,005.28 = 316,978.11 : x
  2. Step 2: Convert to fraction form
    534,865.48/738,005.28 = 316,978.11/x
  3. Step 3: Cross multiply
    534,865.48x = 738,005.28 × 316,978.11
  4. Step 4: Simplify right side
    534,865.48x = 233,931,517,635.75
  5. Step 5: Solve for x
    x = 233,931,517,635.75/534,865.48
  6. Step 6: Final answer
    x = 437,365.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.