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Finding the Fourth Proportional to 925.53, 1,387.89 and 348

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Solution

The fourth proportional to 925.53, 1,387.89 and 348 is: 521.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.53 : 1,387.89 = 348 : x
  2. Step 2: Convert to fraction form
    925.53/1,387.89 = 348/x
  3. Step 3: Cross multiply
    925.53x = 1,387.89 × 348
  4. Step 4: Simplify right side
    925.53x = 482,985.72
  5. Step 5: Solve for x
    x = 482,985.72/925.53
  6. Step 6: Final answer
    x = 521.85

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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.