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Finding the Fourth Proportional to 525.69, 724.78 and 329.13

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Solution

The fourth proportional to 525.69, 724.78 and 329.13 is: 453.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.69 : 724.78 = 329.13 : x
  2. Step 2: Convert to fraction form
    525.69/724.78 = 329.13/x
  3. Step 3: Cross multiply
    525.69x = 724.78 × 329.13
  4. Step 4: Simplify right side
    525.69x = 238,546.84
  5. Step 5: Solve for x
    x = 238,546.84/525.69
  6. Step 6: Final answer
    x = 453.78

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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.