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Finding the Fourth Proportional to 281.75, 424.31 and 247.88

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Solution

The fourth proportional to 281.75, 424.31 and 247.88 is: 373.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.75 : 424.31 = 247.88 : x
  2. Step 2: Convert to fraction form
    281.75/424.31 = 247.88/x
  3. Step 3: Cross multiply
    281.75x = 424.31 × 247.88
  4. Step 4: Simplify right side
    281.75x = 105,175.40
  5. Step 5: Solve for x
    x = 105,175.40/281.75
  6. Step 6: Final answer
    x = 373.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.