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Finding the Fourth Proportional to 280.86, 387.48 and 175.98

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Solution

The fourth proportional to 280.86, 387.48 and 175.98 is: 242.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.86 : 387.48 = 175.98 : x
  2. Step 2: Convert to fraction form
    280.86/387.48 = 175.98/x
  3. Step 3: Cross multiply
    280.86x = 387.48 × 175.98
  4. Step 4: Simplify right side
    280.86x = 68,188.73
  5. Step 5: Solve for x
    x = 68,188.73/280.86
  6. Step 6: Final answer
    x = 242.79

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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.