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Finding the Fourth Proportional to 479,306.42, 718,780.22 and 205,718.09

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Solution

The fourth proportional to 479,306.42, 718,780.22 and 205,718.09 is: 308,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,306.42 : 718,780.22 = 205,718.09 : x
  2. Step 2: Convert to fraction form
    479,306.42/718,780.22 = 205,718.09/x
  3. Step 3: Cross multiply
    479,306.42x = 718,780.22 × 205,718.09
  4. Step 4: Simplify right side
    479,306.42x = 147,866,092,832.56
  5. Step 5: Solve for x
    x = 147,866,092,832.56/479,306.42
  6. Step 6: Final answer
    x = 308,500.13

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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.