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Finding the Fourth Proportional to 477.70, 659.07 and 281.20

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Solution

The fourth proportional to 477.70, 659.07 and 281.20 is: 387.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.70 : 659.07 = 281.20 : x
  2. Step 2: Convert to fraction form
    477.70/659.07 = 281.20/x
  3. Step 3: Cross multiply
    477.70x = 659.07 × 281.20
  4. Step 4: Simplify right side
    477.70x = 185,330.48
  5. Step 5: Solve for x
    x = 185,330.48/477.70
  6. Step 6: Final answer
    x = 387.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.