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Finding the Fourth Proportional to 1,338.98, 2,008.48 and 414.52

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Solution

The fourth proportional to 1,338.98, 2,008.48 and 414.52 is: 621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.98 : 2,008.48 = 414.52 : x
  2. Step 2: Convert to fraction form
    1,338.98/2,008.48 = 414.52/x
  3. Step 3: Cross multiply
    1,338.98x = 2,008.48 × 414.52
  4. Step 4: Simplify right side
    1,338.98x = 832,555.13
  5. Step 5: Solve for x
    x = 832,555.13/1,338.98
  6. Step 6: Final answer
    x = 621.78

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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.