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Finding the Fourth Proportional to 688.72, 950.61 and 426.58

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Solution

The fourth proportional to 688.72, 950.61 and 426.58 is: 588.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.72 : 950.61 = 426.58 : x
  2. Step 2: Convert to fraction form
    688.72/950.61 = 426.58/x
  3. Step 3: Cross multiply
    688.72x = 950.61 × 426.58
  4. Step 4: Simplify right side
    688.72x = 405,511.21
  5. Step 5: Solve for x
    x = 405,511.21/688.72
  6. Step 6: Final answer
    x = 588.79

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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.