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Finding the Fourth Proportional to 218,854.82, 328,278.86 and 133,490.72

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Solution

The fourth proportional to 218,854.82, 328,278.86 and 133,490.72 is: 200,234.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,854.82 : 328,278.86 = 133,490.72 : x
  2. Step 2: Convert to fraction form
    218,854.82/328,278.86 = 133,490.72/x
  3. Step 3: Cross multiply
    218,854.82x = 328,278.86 × 133,490.72
  4. Step 4: Simplify right side
    218,854.82x = 43,822,181,382.18
  5. Step 5: Solve for x
    x = 43,822,181,382.18/218,854.82
  6. Step 6: Final answer
    x = 200,234.02

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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.