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Finding the Fourth Proportional to 280.64, 387.40 and 182.56

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Solution

The fourth proportional to 280.64, 387.40 and 182.56 is: 252.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.64 : 387.40 = 182.56 : x
  2. Step 2: Convert to fraction form
    280.64/387.40 = 182.56/x
  3. Step 3: Cross multiply
    280.64x = 387.40 × 182.56
  4. Step 4: Simplify right side
    280.64x = 70,723.74
  5. Step 5: Solve for x
    x = 70,723.74/280.64
  6. Step 6: Final answer
    x = 252.01

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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.