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Finding the Fourth Proportional to 687.96, 949.05 and 426.06

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Solution

The fourth proportional to 687.96, 949.05 and 426.06 is: 587.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.96 : 949.05 = 426.06 : x
  2. Step 2: Convert to fraction form
    687.96/949.05 = 426.06/x
  3. Step 3: Cross multiply
    687.96x = 949.05 × 426.06
  4. Step 4: Simplify right side
    687.96x = 404,352.24
  5. Step 5: Solve for x
    x = 404,352.24/687.96
  6. Step 6: Final answer
    x = 587.76

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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.