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Finding the Fourth Proportional to 280.38, 386.78 and 182.10

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Solution

The fourth proportional to 280.38, 386.78 and 182.10 is: 251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.38 : 386.78 = 182.10 : x
  2. Step 2: Convert to fraction form
    280.38/386.78 = 182.10/x
  3. Step 3: Cross multiply
    280.38x = 386.78 × 182.10
  4. Step 4: Simplify right side
    280.38x = 70,432.64
  5. Step 5: Solve for x
    x = 70,432.64/280.38
  6. Step 6: Final answer
    x = 251.20

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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.