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Finding the Fourth Proportional to 399,640.20, 551,496.95 and 218,348.22

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Solution

The fourth proportional to 399,640.20, 551,496.95 and 218,348.22 is: 301,316.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,640.20 : 551,496.95 = 218,348.22 : x
  2. Step 2: Convert to fraction form
    399,640.20/551,496.95 = 218,348.22/x
  3. Step 3: Cross multiply
    399,640.20x = 551,496.95 × 218,348.22
  4. Step 4: Simplify right side
    399,640.20x = 120,418,377,367.93
  5. Step 5: Solve for x
    x = 120,418,377,367.93/399,640.20
  6. Step 6: Final answer
    x = 301,316.98

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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.