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Finding the Fourth Proportional to 218,425.80, 327,638.70 and 60,655.80

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Solution

The fourth proportional to 218,425.80, 327,638.70 and 60,655.80 is: 90,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,425.80 : 327,638.70 = 60,655.80 : x
  2. Step 2: Convert to fraction form
    218,425.80/327,638.70 = 60,655.80/x
  3. Step 3: Cross multiply
    218,425.80x = 327,638.70 × 60,655.80
  4. Step 4: Simplify right side
    218,425.80x = 19,873,187,459.46
  5. Step 5: Solve for x
    x = 19,873,187,459.46/218,425.80
  6. Step 6: Final answer
    x = 90,983.70

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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.