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Finding the Fourth Proportional to 281.24, 387.78 and 207.52

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Solution

The fourth proportional to 281.24, 387.78 and 207.52 is: 286.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.24 : 387.78 = 207.52 : x
  2. Step 2: Convert to fraction form
    281.24/387.78 = 207.52/x
  3. Step 3: Cross multiply
    281.24x = 387.78 × 207.52
  4. Step 4: Simplify right side
    281.24x = 80,472.11
  5. Step 5: Solve for x
    x = 80,472.11/281.24
  6. Step 6: Final answer
    x = 286.13

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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.