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Finding the Fourth Proportional to 590.29, 814.74 and 391.15

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Solution

The fourth proportional to 590.29, 814.74 and 391.15 is: 539.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.29 : 814.74 = 391.15 : x
  2. Step 2: Convert to fraction form
    590.29/814.74 = 391.15/x
  3. Step 3: Cross multiply
    590.29x = 814.74 × 391.15
  4. Step 4: Simplify right side
    590.29x = 318,685.55
  5. Step 5: Solve for x
    x = 318,685.55/590.29
  6. Step 6: Final answer
    x = 539.88

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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.