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Finding the Fourth Proportional to 280.96, 387.76 and 176.08

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Solution

The fourth proportional to 280.96, 387.76 and 176.08 is: 243.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.96 : 387.76 = 176.08 : x
  2. Step 2: Convert to fraction form
    280.96/387.76 = 176.08/x
  3. Step 3: Cross multiply
    280.96x = 387.76 × 176.08
  4. Step 4: Simplify right side
    280.96x = 68,276.78
  5. Step 5: Solve for x
    x = 68,276.78/280.96
  6. Step 6: Final answer
    x = 243.01

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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.