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Finding the Fourth Proportional to 1,105.11, 1,658.07 and 740.61

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Solution

The fourth proportional to 1,105.11, 1,658.07 and 740.61 is: 1,111.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.11 : 1,658.07 = 740.61 : x
  2. Step 2: Convert to fraction form
    1,105.11/1,658.07 = 740.61/x
  3. Step 3: Cross multiply
    1,105.11x = 1,658.07 × 740.61
  4. Step 4: Simplify right side
    1,105.11x = 1,227,983.22
  5. Step 5: Solve for x
    x = 1,227,983.22/1,105.11
  6. Step 6: Final answer
    x = 1,111.19

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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.