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Finding the Fourth Proportional to 486.91, 730.14 and 178.69

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Solution

The fourth proportional to 486.91, 730.14 and 178.69 is: 267.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.91 : 730.14 = 178.69 : x
  2. Step 2: Convert to fraction form
    486.91/730.14 = 178.69/x
  3. Step 3: Cross multiply
    486.91x = 730.14 × 178.69
  4. Step 4: Simplify right side
    486.91x = 130,468.72
  5. Step 5: Solve for x
    x = 130,468.72/486.91
  6. Step 6: Final answer
    x = 267.95

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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.