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Finding the Fourth Proportional to 1,187.46, 1,781.82 and 610.34

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Solution

The fourth proportional to 1,187.46, 1,781.82 and 610.34 is: 915.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.46 : 1,781.82 = 610.34 : x
  2. Step 2: Convert to fraction form
    1,187.46/1,781.82 = 610.34/x
  3. Step 3: Cross multiply
    1,187.46x = 1,781.82 × 610.34
  4. Step 4: Simplify right side
    1,187.46x = 1,087,516.02
  5. Step 5: Solve for x
    x = 1,087,516.02/1,187.46
  6. Step 6: Final answer
    x = 915.83

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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.