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Finding the Fourth Proportional to 543,659.36, 815,304.27 and 206,618.90

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Solution

The fourth proportional to 543,659.36, 815,304.27 and 206,618.90 is: 309,858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,659.36 : 815,304.27 = 206,618.90 : x
  2. Step 2: Convert to fraction form
    543,659.36/815,304.27 = 206,618.90/x
  3. Step 3: Cross multiply
    543,659.36x = 815,304.27 × 206,618.90
  4. Step 4: Simplify right side
    543,659.36x = 168,457,271,432.70
  5. Step 5: Solve for x
    x = 168,457,271,432.70/543,659.36
  6. Step 6: Final answer
    x = 309,858.13

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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.