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Finding the Fourth Proportional to 458.92, 633.54 and 328.78

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Solution

The fourth proportional to 458.92, 633.54 and 328.78 is: 453.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.92 : 633.54 = 328.78 : x
  2. Step 2: Convert to fraction form
    458.92/633.54 = 328.78/x
  3. Step 3: Cross multiply
    458.92x = 633.54 × 328.78
  4. Step 4: Simplify right side
    458.92x = 208,295.28
  5. Step 5: Solve for x
    x = 208,295.28/458.92
  6. Step 6: Final answer
    x = 453.88

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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.