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Finding the Fourth Proportional to 720.91, 994.91 and 406.16

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Solution

The fourth proportional to 720.91, 994.91 and 406.16 is: 560.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.91 : 994.91 = 406.16 : x
  2. Step 2: Convert to fraction form
    720.91/994.91 = 406.16/x
  3. Step 3: Cross multiply
    720.91x = 994.91 × 406.16
  4. Step 4: Simplify right side
    720.91x = 404,092.65
  5. Step 5: Solve for x
    x = 404,092.65/720.91
  6. Step 6: Final answer
    x = 560.53

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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.