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Finding the Fourth Proportional to 285,679.89, 394,229.70 and 156,613.95

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Solution

The fourth proportional to 285,679.89, 394,229.70 and 156,613.95 is: 216,122.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,679.89 : 394,229.70 = 156,613.95 : x
  2. Step 2: Convert to fraction form
    285,679.89/394,229.70 = 156,613.95/x
  3. Step 3: Cross multiply
    285,679.89x = 394,229.70 × 156,613.95
  4. Step 4: Simplify right side
    285,679.89x = 61,741,869,633.26
  5. Step 5: Solve for x
    x = 61,741,869,633.26/285,679.89
  6. Step 6: Final answer
    x = 216,122.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.