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Finding the Fourth Proportional to 454.31, 681.88 and 281.31

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Solution

The fourth proportional to 454.31, 681.88 and 281.31 is: 422.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.31 : 681.88 = 281.31 : x
  2. Step 2: Convert to fraction form
    454.31/681.88 = 281.31/x
  3. Step 3: Cross multiply
    454.31x = 681.88 × 281.31
  4. Step 4: Simplify right side
    454.31x = 191,818.26
  5. Step 5: Solve for x
    x = 191,818.26/454.31
  6. Step 6: Final answer
    x = 422.22

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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.