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Finding the Fourth Proportional to 280.50, 386.94 and 180.88

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Solution

The fourth proportional to 280.50, 386.94 and 180.88 is: 249.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.50 : 386.94 = 180.88 : x
  2. Step 2: Convert to fraction form
    280.50/386.94 = 180.88/x
  3. Step 3: Cross multiply
    280.50x = 386.94 × 180.88
  4. Step 4: Simplify right side
    280.50x = 69,989.71
  5. Step 5: Solve for x
    x = 69,989.71/280.50
  6. Step 6: Final answer
    x = 249.52

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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.