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Finding the Fourth Proportional to 426.03, 638.66 and 165.87

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Solution

The fourth proportional to 426.03, 638.66 and 165.87 is: 248.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.03 : 638.66 = 165.87 : x
  2. Step 2: Convert to fraction form
    426.03/638.66 = 165.87/x
  3. Step 3: Cross multiply
    426.03x = 638.66 × 165.87
  4. Step 4: Simplify right side
    426.03x = 105,934.53
  5. Step 5: Solve for x
    x = 105,934.53/426.03
  6. Step 6: Final answer
    x = 248.66

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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.