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Finding the Fourth Proportional to 525.12, 724.38 and 328.59

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Solution

The fourth proportional to 525.12, 724.38 and 328.59 is: 453.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.12 : 724.38 = 328.59 : x
  2. Step 2: Convert to fraction form
    525.12/724.38 = 328.59/x
  3. Step 3: Cross multiply
    525.12x = 724.38 × 328.59
  4. Step 4: Simplify right side
    525.12x = 238,024.02
  5. Step 5: Solve for x
    x = 238,024.02/525.12
  6. Step 6: Final answer
    x = 453.28

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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.