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Finding the Fourth Proportional to 1,182.39, 1,631.72 and 658.44

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Solution

The fourth proportional to 1,182.39, 1,631.72 and 658.44 is: 908.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.39 : 1,631.72 = 658.44 : x
  2. Step 2: Convert to fraction form
    1,182.39/1,631.72 = 658.44/x
  3. Step 3: Cross multiply
    1,182.39x = 1,631.72 × 658.44
  4. Step 4: Simplify right side
    1,182.39x = 1,074,389.72
  5. Step 5: Solve for x
    x = 1,074,389.72/1,182.39
  6. Step 6: Final answer
    x = 908.66

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1.5x scale

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.