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Finding the Fourth Proportional to 534,785.80, 738,004.44 and 308,431.30

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Solution

The fourth proportional to 534,785.80, 738,004.44 and 308,431.30 is: 425,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,785.80 : 738,004.44 = 308,431.30 : x
  2. Step 2: Convert to fraction form
    534,785.80/738,004.44 = 308,431.30/x
  3. Step 3: Cross multiply
    534,785.80x = 738,004.44 × 308,431.30
  4. Step 4: Simplify right side
    534,785.80x = 227,623,668,834.97
  5. Step 5: Solve for x
    x = 227,623,668,834.97/534,785.80
  6. Step 6: Final answer
    x = 425,635.21

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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.