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Finding the Fourth Proportional to 1,152.38, 1,727.88 and 631.49

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Solution

The fourth proportional to 1,152.38, 1,727.88 and 631.49 is: 946.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.38 : 1,727.88 = 631.49 : x
  2. Step 2: Convert to fraction form
    1,152.38/1,727.88 = 631.49/x
  3. Step 3: Cross multiply
    1,152.38x = 1,727.88 × 631.49
  4. Step 4: Simplify right side
    1,152.38x = 1,091,130.30
  5. Step 5: Solve for x
    x = 1,091,130.30/1,152.38
  6. Step 6: Final answer
    x = 946.85

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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.