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Finding the Fourth Proportional to 280.62, 387.30 and 182.40

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Solution

The fourth proportional to 280.62, 387.30 and 182.40 is: 251.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.62 : 387.30 = 182.40 : x
  2. Step 2: Convert to fraction form
    280.62/387.30 = 182.40/x
  3. Step 3: Cross multiply
    280.62x = 387.30 × 182.40
  4. Step 4: Simplify right side
    280.62x = 70,643.52
  5. Step 5: Solve for x
    x = 70,643.52/280.62
  6. Step 6: Final answer
    x = 251.74

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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.