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Finding the Fourth Proportional to 415,030.20, 622,545.30 and 204,640.80

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Solution

The fourth proportional to 415,030.20, 622,545.30 and 204,640.80 is: 306,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,030.20 : 622,545.30 = 204,640.80 : x
  2. Step 2: Convert to fraction form
    415,030.20/622,545.30 = 204,640.80/x
  3. Step 3: Cross multiply
    415,030.20x = 622,545.30 × 204,640.80
  4. Step 4: Simplify right side
    415,030.20x = 127,398,168,228.24
  5. Step 5: Solve for x
    x = 127,398,168,228.24/415,030.20
  6. Step 6: Final answer
    x = 306,961.20

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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.