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Finding the Fourth Proportional to 486.77, 729.72 and 178.55

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Solution

The fourth proportional to 486.77, 729.72 and 178.55 is: 267.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.77 : 729.72 = 178.55 : x
  2. Step 2: Convert to fraction form
    486.77/729.72 = 178.55/x
  3. Step 3: Cross multiply
    486.77x = 729.72 × 178.55
  4. Step 4: Simplify right side
    486.77x = 130,289.01
  5. Step 5: Solve for x
    x = 130,289.01/486.77
  6. Step 6: Final answer
    x = 267.66

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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.