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Finding the Fourth Proportional to 3,803.79, 5,708.24 and 1,338.63

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Solution

The fourth proportional to 3,803.79, 5,708.24 and 1,338.63 is: 2,008.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,803.79 : 5,708.24 = 1,338.63 : x
  2. Step 2: Convert to fraction form
    3,803.79/5,708.24 = 1,338.63/x
  3. Step 3: Cross multiply
    3,803.79x = 5,708.24 × 1,338.63
  4. Step 4: Simplify right side
    3,803.79x = 7,641,221.31
  5. Step 5: Solve for x
    x = 7,641,221.31/3,803.79
  6. Step 6: Final answer
    x = 2,008.84

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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.