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Finding the Fourth Proportional to 218,960.28, 328,489.56 and 69,209.28

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Solution

The fourth proportional to 218,960.28, 328,489.56 and 69,209.28 is: 103,829.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,960.28 : 328,489.56 = 69,209.28 : x
  2. Step 2: Convert to fraction form
    218,960.28/328,489.56 = 69,209.28/x
  3. Step 3: Cross multiply
    218,960.28x = 328,489.56 × 69,209.28
  4. Step 4: Simplify right side
    218,960.28x = 22,734,525,935.12
  5. Step 5: Solve for x
    x = 22,734,525,935.12/218,960.28
  6. Step 6: Final answer
    x = 103,829.45

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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.