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Finding the Fourth Proportional to 720.70, 994.51 and 425.99

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Solution

The fourth proportional to 720.70, 994.51 and 425.99 is: 587.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.70 : 994.51 = 425.99 : x
  2. Step 2: Convert to fraction form
    720.70/994.51 = 425.99/x
  3. Step 3: Cross multiply
    720.70x = 994.51 × 425.99
  4. Step 4: Simplify right side
    720.70x = 423,651.31
  5. Step 5: Solve for x
    x = 423,651.31/720.70
  6. Step 6: Final answer
    x = 587.83

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.