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Finding the Fourth Proportional to 3,679.47, 5,519.16 and 1,339.47

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Solution

The fourth proportional to 3,679.47, 5,519.16 and 1,339.47 is: 2,009.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.47 : 5,519.16 = 1,339.47 : x
  2. Step 2: Convert to fraction form
    3,679.47/5,519.16 = 1,339.47/x
  3. Step 3: Cross multiply
    3,679.47x = 5,519.16 × 1,339.47
  4. Step 4: Simplify right side
    3,679.47x = 7,392,749.25
  5. Step 5: Solve for x
    x = 7,392,749.25/3,679.47
  6. Step 6: Final answer
    x = 2,009.19

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1.5x scale

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.