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Finding the Fourth Proportional to 525.17, 724.70 and 289.12

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Solution

The fourth proportional to 525.17, 724.70 and 289.12 is: 398.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.17 : 724.70 = 289.12 : x
  2. Step 2: Convert to fraction form
    525.17/724.70 = 289.12/x
  3. Step 3: Cross multiply
    525.17x = 724.70 × 289.12
  4. Step 4: Simplify right side
    525.17x = 209,525.26
  5. Step 5: Solve for x
    x = 209,525.26/525.17
  6. Step 6: Final answer
    x = 398.97

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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.