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Finding the Fourth Proportional to 811,960.80, 1,217,422.80 and 338,834.40

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Solution

The fourth proportional to 811,960.80, 1,217,422.80 and 338,834.40 is: 508,035.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,960.80 : 1,217,422.80 = 338,834.40 : x
  2. Step 2: Convert to fraction form
    811,960.80/1,217,422.80 = 338,834.40/x
  3. Step 3: Cross multiply
    811,960.80x = 1,217,422.80 × 338,834.40
  4. Step 4: Simplify right side
    811,960.80x = 412,504,723,984.32
  5. Step 5: Solve for x
    x = 412,504,723,984.32/811,960.80
  6. Step 6: Final answer
    x = 508,035.27

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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.