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Finding the Fourth Proportional to 1,182.05, 1,631.09 and 658.04

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Solution

The fourth proportional to 1,182.05, 1,631.09 and 658.04 is: 908.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.05 : 1,631.09 = 658.04 : x
  2. Step 2: Convert to fraction form
    1,182.05/1,631.09 = 658.04/x
  3. Step 3: Cross multiply
    1,182.05x = 1,631.09 × 658.04
  4. Step 4: Simplify right side
    1,182.05x = 1,073,328.19
  5. Step 5: Solve for x
    x = 1,073,328.19/1,182.05
  6. Step 6: Final answer
    x = 908.03

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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.