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Finding the Fourth Proportional to 700.43, 1,049.39 and 426.38

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Solution

The fourth proportional to 700.43, 1,049.39 and 426.38 is: 638.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.43 : 1,049.39 = 426.38 : x
  2. Step 2: Convert to fraction form
    700.43/1,049.39 = 426.38/x
  3. Step 3: Cross multiply
    700.43x = 1,049.39 × 426.38
  4. Step 4: Simplify right side
    700.43x = 447,437.35
  5. Step 5: Solve for x
    x = 447,437.35/700.43
  6. Step 6: Final answer
    x = 638.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.