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Finding the Fourth Proportional to 1,486, 2,229.95 and 620.38

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Solution

The fourth proportional to 1,486, 2,229.95 and 620.38 is: 930.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486 : 2,229.95 = 620.38 : x
  2. Step 2: Convert to fraction form
    1,486/2,229.95 = 620.38/x
  3. Step 3: Cross multiply
    1,486x = 2,229.95 × 620.38
  4. Step 4: Simplify right side
    1,486x = 1,383,416.38
  5. Step 5: Solve for x
    x = 1,383,416.38/1,486
  6. Step 6: Final answer
    x = 930.97

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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.