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Finding the Fourth Proportional to 371,286.50, 512,508.30 and 220,383.50

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Solution

The fourth proportional to 371,286.50, 512,508.30 and 220,383.50 is: 304,208.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,286.50 : 512,508.30 = 220,383.50 : x
  2. Step 2: Convert to fraction form
    371,286.50/512,508.30 = 220,383.50/x
  3. Step 3: Cross multiply
    371,286.50x = 512,508.30 × 220,383.50
  4. Step 4: Simplify right side
    371,286.50x = 112,948,372,933.05
  5. Step 5: Solve for x
    x = 112,948,372,933.05/371,286.50
  6. Step 6: Final answer
    x = 304,208.13

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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.