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Finding the Fourth Proportional to 218,428.40, 327,383.40 and 113,193.20

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Solution

The fourth proportional to 218,428.40, 327,383.40 and 113,193.20 is: 169,655.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,428.40 : 327,383.40 = 113,193.20 : x
  2. Step 2: Convert to fraction form
    218,428.40/327,383.40 = 113,193.20/x
  3. Step 3: Cross multiply
    218,428.40x = 327,383.40 × 113,193.20
  4. Step 4: Simplify right side
    218,428.40x = 37,057,574,672.88
  5. Step 5: Solve for x
    x = 37,057,574,672.88/218,428.40
  6. Step 6: Final answer
    x = 169,655.48

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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.