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Finding the Fourth Proportional to 720.46, 994.42 and 425.82

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Solution

The fourth proportional to 720.46, 994.42 and 425.82 is: 587.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.46 : 994.42 = 425.82 : x
  2. Step 2: Convert to fraction form
    720.46/994.42 = 425.82/x
  3. Step 3: Cross multiply
    720.46x = 994.42 × 425.82
  4. Step 4: Simplify right side
    720.46x = 423,443.92
  5. Step 5: Solve for x
    x = 423,443.92/720.46
  6. Step 6: Final answer
    x = 587.74

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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.