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Finding the Fourth Proportional to 525.61, 724.71 and 329.05

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Solution

The fourth proportional to 525.61, 724.71 and 329.05 is: 453.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.61 : 724.71 = 329.05 : x
  2. Step 2: Convert to fraction form
    525.61/724.71 = 329.05/x
  3. Step 3: Cross multiply
    525.61x = 724.71 × 329.05
  4. Step 4: Simplify right side
    525.61x = 238,465.83
  5. Step 5: Solve for x
    x = 238,465.83/525.61
  6. Step 6: Final answer
    x = 453.69

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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.