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Finding the Fourth Proportional to 543,641.26, 815,138.88 and 206,706.55

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Solution

The fourth proportional to 543,641.26, 815,138.88 and 206,706.55 is: 309,937.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,641.26 : 815,138.88 = 206,706.55 : x
  2. Step 2: Convert to fraction form
    543,641.26/815,138.88 = 206,706.55/x
  3. Step 3: Cross multiply
    543,641.26x = 815,138.88 × 206,706.55
  4. Step 4: Simplify right side
    543,641.26x = 168,494,545,655.66
  5. Step 5: Solve for x
    x = 168,494,545,655.66/543,641.26
  6. Step 6: Final answer
    x = 309,937.01

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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.