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Finding the Fourth Proportional to 725.98, 993.28 and 722.92

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Solution

The fourth proportional to 725.98, 993.28 and 722.92 is: 989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.98 : 993.28 = 722.92 : x
  2. Step 2: Convert to fraction form
    725.98/993.28 = 722.92/x
  3. Step 3: Cross multiply
    725.98x = 993.28 × 722.92
  4. Step 4: Simplify right side
    725.98x = 718,061.98
  5. Step 5: Solve for x
    x = 718,061.98/725.98
  6. Step 6: Final answer
    x = 989.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.