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Finding the Fourth Proportional to 218,663.28, 328,003.56 and 60,905.52

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Solution

The fourth proportional to 218,663.28, 328,003.56 and 60,905.52 is: 91,360.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,663.28 : 328,003.56 = 60,905.52 : x
  2. Step 2: Convert to fraction form
    218,663.28/328,003.56 = 60,905.52/x
  3. Step 3: Cross multiply
    218,663.28x = 328,003.56 × 60,905.52
  4. Step 4: Simplify right side
    218,663.28x = 19,977,227,383.65
  5. Step 5: Solve for x
    x = 19,977,227,383.65/218,663.28
  6. Step 6: Final answer
    x = 91,360.69

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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.