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Finding the Fourth Proportional to 1,338.83, 2,009 and 722.52

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Solution

The fourth proportional to 1,338.83, 2,009 and 722.52 is: 1,084.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.83 : 2,009 = 722.52 : x
  2. Step 2: Convert to fraction form
    1,338.83/2,009 = 722.52/x
  3. Step 3: Cross multiply
    1,338.83x = 2,009 × 722.52
  4. Step 4: Simplify right side
    1,338.83x = 1,451,542.68
  5. Step 5: Solve for x
    x = 1,451,542.68/1,338.83
  6. Step 6: Final answer
    x = 1,084.19

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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.