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Finding the Fourth Proportional to 691.52, 954.28 and 381

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Solution

The fourth proportional to 691.52, 954.28 and 381 is: 525.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.52 : 954.28 = 381 : x
  2. Step 2: Convert to fraction form
    691.52/954.28 = 381/x
  3. Step 3: Cross multiply
    691.52x = 954.28 × 381
  4. Step 4: Simplify right side
    691.52x = 363,580.68
  5. Step 5: Solve for x
    x = 363,580.68/691.52
  6. Step 6: Final answer
    x = 525.77

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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.