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Finding the Fourth Proportional to 1,182.39, 1,631.70 and 658.41

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Solution

The fourth proportional to 1,182.39, 1,631.70 and 658.41 is: 908.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.39 : 1,631.70 = 658.41 : x
  2. Step 2: Convert to fraction form
    1,182.39/1,631.70 = 658.41/x
  3. Step 3: Cross multiply
    1,182.39x = 1,631.70 × 658.41
  4. Step 4: Simplify right side
    1,182.39x = 1,074,327.60
  5. Step 5: Solve for x
    x = 1,074,327.60/1,182.39
  6. Step 6: Final answer
    x = 908.61

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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.