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Finding the Fourth Proportional to 725.48, 999.76 and 518.12

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Solution

The fourth proportional to 725.48, 999.76 and 518.12 is: 714.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.48 : 999.76 = 518.12 : x
  2. Step 2: Convert to fraction form
    725.48/999.76 = 518.12/x
  3. Step 3: Cross multiply
    725.48x = 999.76 × 518.12
  4. Step 4: Simplify right side
    725.48x = 517,995.65
  5. Step 5: Solve for x
    x = 517,995.65/725.48
  6. Step 6: Final answer
    x = 714.00

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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.