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Finding the Fourth Proportional to 932.04, 1,396.64 and 638.50

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Solution

The fourth proportional to 932.04, 1,396.64 and 638.50 is: 956.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.04 : 1,396.64 = 638.50 : x
  2. Step 2: Convert to fraction form
    932.04/1,396.64 = 638.50/x
  3. Step 3: Cross multiply
    932.04x = 1,396.64 × 638.50
  4. Step 4: Simplify right side
    932.04x = 891,754.64
  5. Step 5: Solve for x
    x = 891,754.64/932.04
  6. Step 6: Final answer
    x = 956.78

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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.