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Finding the Fourth Proportional to 399,348.42, 551,123.19 and 218,077.26

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Solution

The fourth proportional to 399,348.42, 551,123.19 and 218,077.26 is: 300,958.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,348.42 : 551,123.19 = 218,077.26 : x
  2. Step 2: Convert to fraction form
    399,348.42/551,123.19 = 218,077.26/x
  3. Step 3: Cross multiply
    399,348.42x = 551,123.19 × 218,077.26
  4. Step 4: Simplify right side
    399,348.42x = 120,187,435,197.66
  5. Step 5: Solve for x
    x = 120,187,435,197.66/399,348.42
  6. Step 6: Final answer
    x = 300,958.83

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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.