Home / 2,309.60-3,186-1,377.92

Finding the Fourth Proportional to 2,309.60, 3,186 and 1,377.92

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Solution

The fourth proportional to 2,309.60, 3,186 and 1,377.92 is: 1,900.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.60 : 3,186 = 1,377.92 : x
  2. Step 2: Convert to fraction form
    2,309.60/3,186 = 1,377.92/x
  3. Step 3: Cross multiply
    2,309.60x = 3,186 × 1,377.92
  4. Step 4: Simplify right side
    2,309.60x = 4,390,053.12
  5. Step 5: Solve for x
    x = 4,390,053.12/2,309.60
  6. Step 6: Final answer
    x = 1,900.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.