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Finding the Fourth Proportional to 279,398.65, 419,199.36 and 172,658.20

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Solution

The fourth proportional to 279,398.65, 419,199.36 and 172,658.20 is: 259,049.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,398.65 : 419,199.36 = 172,658.20 : x
  2. Step 2: Convert to fraction form
    279,398.65/419,199.36 = 172,658.20/x
  3. Step 3: Cross multiply
    279,398.65x = 419,199.36 × 172,658.20
  4. Step 4: Simplify right side
    279,398.65x = 72,378,206,938.75
  5. Step 5: Solve for x
    x = 72,378,206,938.75/279,398.65
  6. Step 6: Final answer
    x = 259,049.95

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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.