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Finding the Fourth Proportional to 281.45, 388.17 and 176.45

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Solution

The fourth proportional to 281.45, 388.17 and 176.45 is: 243.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.45 : 388.17 = 176.45 : x
  2. Step 2: Convert to fraction form
    281.45/388.17 = 176.45/x
  3. Step 3: Cross multiply
    281.45x = 388.17 × 176.45
  4. Step 4: Simplify right side
    281.45x = 68,490.66
  5. Step 5: Solve for x
    x = 68,490.66/281.45
  6. Step 6: Final answer
    x = 243.35

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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.