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Finding the Fourth Proportional to 280.40, 387.04 and 182.16

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Solution

The fourth proportional to 280.40, 387.04 and 182.16 is: 251.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.40 : 387.04 = 182.16 : x
  2. Step 2: Convert to fraction form
    280.40/387.04 = 182.16/x
  3. Step 3: Cross multiply
    280.40x = 387.04 × 182.16
  4. Step 4: Simplify right side
    280.40x = 70,501.27
  5. Step 5: Solve for x
    x = 70,501.27/280.40
  6. Step 6: Final answer
    x = 251.43

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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.