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Finding the Fourth Proportional to 206,612.40, 309,335.40 and 200,780.40

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Solution

The fourth proportional to 206,612.40, 309,335.40 and 200,780.40 is: 300,603.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,612.40 : 309,335.40 = 200,780.40 : x
  2. Step 2: Convert to fraction form
    206,612.40/309,335.40 = 200,780.40/x
  3. Step 3: Cross multiply
    206,612.40x = 309,335.40 × 200,780.40
  4. Step 4: Simplify right side
    206,612.40x = 62,108,485,346.16
  5. Step 5: Solve for x
    x = 62,108,485,346.16/206,612.40
  6. Step 6: Final answer
    x = 300,603.86

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1.5x scale

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.