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Finding the Fourth Proportional to 720.95, 994.82 and 406.19

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Solution

The fourth proportional to 720.95, 994.82 and 406.19 is: 560.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.95 : 994.82 = 406.19 : x
  2. Step 2: Convert to fraction form
    720.95/994.82 = 406.19/x
  3. Step 3: Cross multiply
    720.95x = 994.82 × 406.19
  4. Step 4: Simplify right side
    720.95x = 404,081.98
  5. Step 5: Solve for x
    x = 404,081.98/720.95
  6. Step 6: Final answer
    x = 560.49

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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.