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Finding the Fourth Proportional to 721.96, 994.62 and 590.20

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Solution

The fourth proportional to 721.96, 994.62 and 590.20 is: 813.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.96 : 994.62 = 590.20 : x
  2. Step 2: Convert to fraction form
    721.96/994.62 = 590.20/x
  3. Step 3: Cross multiply
    721.96x = 994.62 × 590.20
  4. Step 4: Simplify right side
    721.96x = 587,024.72
  5. Step 5: Solve for x
    x = 587,024.72/721.96
  6. Step 6: Final answer
    x = 813.10

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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.