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Finding the Fourth Proportional to 661,382.84, 991,585.92 and 211,843.64

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Solution

The fourth proportional to 661,382.84, 991,585.92 and 211,843.64 is: 317,609.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,382.84 : 991,585.92 = 211,843.64 : x
  2. Step 2: Convert to fraction form
    661,382.84/991,585.92 = 211,843.64/x
  3. Step 3: Cross multiply
    661,382.84x = 991,585.92 × 211,843.64
  4. Step 4: Simplify right side
    661,382.84x = 210,061,170,665.55
  5. Step 5: Solve for x
    x = 210,061,170,665.55/661,382.84
  6. Step 6: Final answer
    x = 317,609.04

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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.