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Finding the Fourth Proportional to 218,018.73, 326,654.40 and 173,178.40

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Solution

The fourth proportional to 218,018.73, 326,654.40 and 173,178.40 is: 259,470.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,018.73 : 326,654.40 = 173,178.40 : x
  2. Step 2: Convert to fraction form
    218,018.73/326,654.40 = 173,178.40/x
  3. Step 3: Cross multiply
    218,018.73x = 326,654.40 × 173,178.40
  4. Step 4: Simplify right side
    218,018.73x = 56,569,486,344.96
  5. Step 5: Solve for x
    x = 56,569,486,344.96/218,018.73
  6. Step 6: Final answer
    x = 259,470.76

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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.