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Finding the Fourth Proportional to 1,332.62, 1,997.57 and 638.27

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Solution

The fourth proportional to 1,332.62, 1,997.57 and 638.27 is: 956.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.62 : 1,997.57 = 638.27 : x
  2. Step 2: Convert to fraction form
    1,332.62/1,997.57 = 638.27/x
  3. Step 3: Cross multiply
    1,332.62x = 1,997.57 × 638.27
  4. Step 4: Simplify right side
    1,332.62x = 1,274,975.82
  5. Step 5: Solve for x
    x = 1,274,975.82/1,332.62
  6. Step 6: Final answer
    x = 956.75

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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.