Home / 2,039.60-3,059.40-1,388.72

Finding the Fourth Proportional to 2,039.60, 3,059.40 and 1,388.72

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Solution

The fourth proportional to 2,039.60, 3,059.40 and 1,388.72 is: 2,083.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.60 : 3,059.40 = 1,388.72 : x
  2. Step 2: Convert to fraction form
    2,039.60/3,059.40 = 1,388.72/x
  3. Step 3: Cross multiply
    2,039.60x = 3,059.40 × 1,388.72
  4. Step 4: Simplify right side
    2,039.60x = 4,248,649.97
  5. Step 5: Solve for x
    x = 4,248,649.97/2,039.60
  6. Step 6: Final answer
    x = 2,083.08

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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.