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Finding the Fourth Proportional to 925.31, 1,387.16 and 348.59

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Solution

The fourth proportional to 925.31, 1,387.16 and 348.59 is: 522.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.31 : 1,387.16 = 348.59 : x
  2. Step 2: Convert to fraction form
    925.31/1,387.16 = 348.59/x
  3. Step 3: Cross multiply
    925.31x = 1,387.16 × 348.59
  4. Step 4: Simplify right side
    925.31x = 483,550.10
  5. Step 5: Solve for x
    x = 483,550.10/925.31
  6. Step 6: Final answer
    x = 522.58

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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.