Home / 858,103.43-1,287,162.89-218,407.85

Finding the Fourth Proportional to 858,103.43, 1,287,162.89 and 218,407.85

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Solution

The fourth proportional to 858,103.43, 1,287,162.89 and 218,407.85 is: 327,613.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,103.43 : 1,287,162.89 = 218,407.85 : x
  2. Step 2: Convert to fraction form
    858,103.43/1,287,162.89 = 218,407.85/x
  3. Step 3: Cross multiply
    858,103.43x = 1,287,162.89 × 218,407.85
  4. Step 4: Simplify right side
    858,103.43x = 281,126,479,404.69
  5. Step 5: Solve for x
    x = 281,126,479,404.69/858,103.43
  6. Step 6: Final answer
    x = 327,613.75

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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.