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Finding the Fourth Proportional to 691.52, 954.30 and 381.02

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Solution

The fourth proportional to 691.52, 954.30 and 381.02 is: 525.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.52 : 954.30 = 381.02 : x
  2. Step 2: Convert to fraction form
    691.52/954.30 = 381.02/x
  3. Step 3: Cross multiply
    691.52x = 954.30 × 381.02
  4. Step 4: Simplify right side
    691.52x = 363,606.43
  5. Step 5: Solve for x
    x = 363,606.43/691.52
  6. Step 6: Final answer
    x = 525.81

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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.