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Finding the Fourth Proportional to 486.74, 730.17 and 178.74

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Solution

The fourth proportional to 486.74, 730.17 and 178.74 is: 268.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.74 : 730.17 = 178.74 : x
  2. Step 2: Convert to fraction form
    486.74/730.17 = 178.74/x
  3. Step 3: Cross multiply
    486.74x = 730.17 × 178.74
  4. Step 4: Simplify right side
    486.74x = 130,510.59
  5. Step 5: Solve for x
    x = 130,510.59/486.74
  6. Step 6: Final answer
    x = 268.13

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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.