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Finding the Fourth Proportional to 281.22, 387.98 and 176.28

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Solution

The fourth proportional to 281.22, 387.98 and 176.28 is: 243.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.22 : 387.98 = 176.28 : x
  2. Step 2: Convert to fraction form
    281.22/387.98 = 176.28/x
  3. Step 3: Cross multiply
    281.22x = 387.98 × 176.28
  4. Step 4: Simplify right side
    281.22x = 68,393.11
  5. Step 5: Solve for x
    x = 68,393.11/281.22
  6. Step 6: Final answer
    x = 243.20

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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.