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Finding the Fourth Proportional to 281.50, 388.49 and 165.10

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Solution

The fourth proportional to 281.50, 388.49 and 165.10 is: 227.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.50 : 388.49 = 165.10 : x
  2. Step 2: Convert to fraction form
    281.50/388.49 = 165.10/x
  3. Step 3: Cross multiply
    281.50x = 388.49 × 165.10
  4. Step 4: Simplify right side
    281.50x = 64,139.70
  5. Step 5: Solve for x
    x = 64,139.70/281.50
  6. Step 6: Final answer
    x = 227.85

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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.