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Finding the Fourth Proportional to 280.57, 387.22 and 181.00

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Solution

The fourth proportional to 280.57, 387.22 and 181.00 is: 249.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.57 : 387.22 = 181.00 : x
  2. Step 2: Convert to fraction form
    280.57/387.22 = 181.00/x
  3. Step 3: Cross multiply
    280.57x = 387.22 × 181.00
  4. Step 4: Simplify right side
    280.57x = 70,084.88
  5. Step 5: Solve for x
    x = 70,084.88/280.57
  6. Step 6: Final answer
    x = 249.79

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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.