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Finding the Fourth Proportional to 281.55, 388.52 and 165.10

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Solution

The fourth proportional to 281.55, 388.52 and 165.10 is: 227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.55 : 388.52 = 165.10 : x
  2. Step 2: Convert to fraction form
    281.55/388.52 = 165.10/x
  3. Step 3: Cross multiply
    281.55x = 388.52 × 165.10
  4. Step 4: Simplify right side
    281.55x = 64,143.83
  5. Step 5: Solve for x
    x = 64,143.83/281.55
  6. Step 6: Final answer
    x = 227.83

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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.