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Finding the Fourth Proportional to 538.90, 807.24 and 392.56

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Solution

The fourth proportional to 538.90, 807.24 and 392.56 is: 588.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.90 : 807.24 = 392.56 : x
  2. Step 2: Convert to fraction form
    538.90/807.24 = 392.56/x
  3. Step 3: Cross multiply
    538.90x = 807.24 × 392.56
  4. Step 4: Simplify right side
    538.90x = 316,890.13
  5. Step 5: Solve for x
    x = 316,890.13/538.90
  6. Step 6: Final answer
    x = 588.03

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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.