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Finding the Fourth Proportional to 1,242.53, 1,864.74 and 658.22

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Solution

The fourth proportional to 1,242.53, 1,864.74 and 658.22 is: 987.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.53 : 1,864.74 = 658.22 : x
  2. Step 2: Convert to fraction form
    1,242.53/1,864.74 = 658.22/x
  3. Step 3: Cross multiply
    1,242.53x = 1,864.74 × 658.22
  4. Step 4: Simplify right side
    1,242.53x = 1,227,399.84
  5. Step 5: Solve for x
    x = 1,227,399.84/1,242.53
  6. Step 6: Final answer
    x = 987.83

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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.