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Finding the Fourth Proportional to 454.92, 627.42 and 280.20

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Solution

The fourth proportional to 454.92, 627.42 and 280.20 is: 386.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.92 : 627.42 = 280.20 : x
  2. Step 2: Convert to fraction form
    454.92/627.42 = 280.20/x
  3. Step 3: Cross multiply
    454.92x = 627.42 × 280.20
  4. Step 4: Simplify right side
    454.92x = 175,803.08
  5. Step 5: Solve for x
    x = 175,803.08/454.92
  6. Step 6: Final answer
    x = 386.45

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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.