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Finding the Fourth Proportional to 723.25, 998.46 and 680.05

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Solution

The fourth proportional to 723.25, 998.46 and 680.05 is: 938.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.25 : 998.46 = 680.05 : x
  2. Step 2: Convert to fraction form
    723.25/998.46 = 680.05/x
  3. Step 3: Cross multiply
    723.25x = 998.46 × 680.05
  4. Step 4: Simplify right side
    723.25x = 679,002.72
  5. Step 5: Solve for x
    x = 679,002.72/723.25
  6. Step 6: Final answer
    x = 938.82

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1.5x scale

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.