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Finding the Fourth Proportional to 925.31, 1,387.58 and 340.17

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Solution

The fourth proportional to 925.31, 1,387.58 and 340.17 is: 510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.31 : 1,387.58 = 340.17 : x
  2. Step 2: Convert to fraction form
    925.31/1,387.58 = 340.17/x
  3. Step 3: Cross multiply
    925.31x = 1,387.58 × 340.17
  4. Step 4: Simplify right side
    925.31x = 472,013.94
  5. Step 5: Solve for x
    x = 472,013.94/925.31
  6. Step 6: Final answer
    x = 510.12

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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.