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Finding the Fourth Proportional to 1,242.02, 1,861.84 and 461.48

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Solution

The fourth proportional to 1,242.02, 1,861.84 and 461.48 is: 691.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.02 : 1,861.84 = 461.48 : x
  2. Step 2: Convert to fraction form
    1,242.02/1,861.84 = 461.48/x
  3. Step 3: Cross multiply
    1,242.02x = 1,861.84 × 461.48
  4. Step 4: Simplify right side
    1,242.02x = 859,205.42
  5. Step 5: Solve for x
    x = 859,205.42/1,242.02
  6. Step 6: Final answer
    x = 691.78

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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.