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Finding the Fourth Proportional to 720.88, 994.95 and 574.66

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Solution

The fourth proportional to 720.88, 994.95 and 574.66 is: 793.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.88 : 994.95 = 574.66 : x
  2. Step 2: Convert to fraction form
    720.88/994.95 = 574.66/x
  3. Step 3: Cross multiply
    720.88x = 994.95 × 574.66
  4. Step 4: Simplify right side
    720.88x = 571,757.97
  5. Step 5: Solve for x
    x = 571,757.97/720.88
  6. Step 6: Final answer
    x = 793.14

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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.