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Finding the Fourth Proportional to 525.28, 724.40 and 499.36

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Solution

The fourth proportional to 525.28, 724.40 and 499.36 is: 688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.28 : 724.40 = 499.36 : x
  2. Step 2: Convert to fraction form
    525.28/724.40 = 499.36/x
  3. Step 3: Cross multiply
    525.28x = 724.40 × 499.36
  4. Step 4: Simplify right side
    525.28x = 361,736.38
  5. Step 5: Solve for x
    x = 361,736.38/525.28
  6. Step 6: Final answer
    x = 688.65

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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.