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Finding the Fourth Proportional to 332.90, 458.55 and 280.38

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Solution

The fourth proportional to 332.90, 458.55 and 280.38 is: 386.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.90 : 458.55 = 280.38 : x
  2. Step 2: Convert to fraction form
    332.90/458.55 = 280.38/x
  3. Step 3: Cross multiply
    332.90x = 458.55 × 280.38
  4. Step 4: Simplify right side
    332.90x = 128,568.25
  5. Step 5: Solve for x
    x = 128,568.25/332.90
  6. Step 6: Final answer
    x = 386.21

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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.