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Finding the Fourth Proportional to 221,286.70, 331,979.40 and 63,502.86

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Solution

The fourth proportional to 221,286.70, 331,979.40 and 63,502.86 is: 95,268.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,286.70 : 331,979.40 = 63,502.86 : x
  2. Step 2: Convert to fraction form
    221,286.70/331,979.40 = 63,502.86/x
  3. Step 3: Cross multiply
    221,286.70x = 331,979.40 × 63,502.86
  4. Step 4: Simplify right side
    221,286.70x = 21,081,641,361.08
  5. Step 5: Solve for x
    x = 21,081,641,361.08/221,286.70
  6. Step 6: Final answer
    x = 95,268.45

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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.