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Finding the Fourth Proportional to 1,180.68, 1,770.72 and 487.55

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Solution

The fourth proportional to 1,180.68, 1,770.72 and 487.55 is: 731.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.68 : 1,770.72 = 487.55 : x
  2. Step 2: Convert to fraction form
    1,180.68/1,770.72 = 487.55/x
  3. Step 3: Cross multiply
    1,180.68x = 1,770.72 × 487.55
  4. Step 4: Simplify right side
    1,180.68x = 863,305.68
  5. Step 5: Solve for x
    x = 863,305.68/1,180.68
  6. Step 6: Final answer
    x = 731.19

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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.