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Finding the Fourth Proportional to 1,182.15, 1,631.25 and 658.13

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Solution

The fourth proportional to 1,182.15, 1,631.25 and 658.13 is: 908.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.15 : 1,631.25 = 658.13 : x
  2. Step 2: Convert to fraction form
    1,182.15/1,631.25 = 658.13/x
  3. Step 3: Cross multiply
    1,182.15x = 1,631.25 × 658.13
  4. Step 4: Simplify right side
    1,182.15x = 1,073,566.41
  5. Step 5: Solve for x
    x = 1,073,566.41/1,182.15
  6. Step 6: Final answer
    x = 908.15

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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.