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Finding the Fourth Proportional to 363,939.40, 545,909.10 and 206,475.40

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Solution

The fourth proportional to 363,939.40, 545,909.10 and 206,475.40 is: 309,713.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,939.40 : 545,909.10 = 206,475.40 : x
  2. Step 2: Convert to fraction form
    363,939.40/545,909.10 = 206,475.40/x
  3. Step 3: Cross multiply
    363,939.40x = 545,909.10 × 206,475.40
  4. Step 4: Simplify right side
    363,939.40x = 112,716,799,786.14
  5. Step 5: Solve for x
    x = 112,716,799,786.14/363,939.40
  6. Step 6: Final answer
    x = 309,713.10

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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.