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Finding the Fourth Proportional to 720.94, 994.84 and 426.15

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Solution

The fourth proportional to 720.94, 994.84 and 426.15 is: 588.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.94 : 994.84 = 426.15 : x
  2. Step 2: Convert to fraction form
    720.94/994.84 = 426.15/x
  3. Step 3: Cross multiply
    720.94x = 994.84 × 426.15
  4. Step 4: Simplify right side
    720.94x = 423,948.94
  5. Step 5: Solve for x
    x = 423,948.94/720.94
  6. Step 6: Final answer
    x = 588.05

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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.