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Finding the Fourth Proportional to 426.04, 638.45 and 178.97

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Solution

The fourth proportional to 426.04, 638.45 and 178.97 is: 268.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.04 : 638.45 = 178.97 : x
  2. Step 2: Convert to fraction form
    426.04/638.45 = 178.97/x
  3. Step 3: Cross multiply
    426.04x = 638.45 × 178.97
  4. Step 4: Simplify right side
    426.04x = 114,263.40
  5. Step 5: Solve for x
    x = 114,263.40/426.04
  6. Step 6: Final answer
    x = 268.20

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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.