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Finding the Fourth Proportional to 718.89, 992.49 and 552.78

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Solution

The fourth proportional to 718.89, 992.49 and 552.78 is: 763.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.89 : 992.49 = 552.78 : x
  2. Step 2: Convert to fraction form
    718.89/992.49 = 552.78/x
  3. Step 3: Cross multiply
    718.89x = 992.49 × 552.78
  4. Step 4: Simplify right side
    718.89x = 548,628.62
  5. Step 5: Solve for x
    x = 548,628.62/718.89
  6. Step 6: Final answer
    x = 763.16

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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.