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Finding the Fourth Proportional to 525.40, 725.05 and 329.02

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Solution

The fourth proportional to 525.40, 725.05 and 329.02 is: 454.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.40 : 725.05 = 329.02 : x
  2. Step 2: Convert to fraction form
    525.40/725.05 = 329.02/x
  3. Step 3: Cross multiply
    525.40x = 725.05 × 329.02
  4. Step 4: Simplify right side
    525.40x = 238,550.68
  5. Step 5: Solve for x
    x = 238,550.68/525.40
  6. Step 6: Final answer
    x = 454.04

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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.