Home / 3,115.12-4,298.85-1,717.87

Finding the Fourth Proportional to 3,115.12, 4,298.85 and 1,717.87

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Solution

The fourth proportional to 3,115.12, 4,298.85 and 1,717.87 is: 2,370.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.12 : 4,298.85 = 1,717.87 : x
  2. Step 2: Convert to fraction form
    3,115.12/4,298.85 = 1,717.87/x
  3. Step 3: Cross multiply
    3,115.12x = 4,298.85 × 1,717.87
  4. Step 4: Simplify right side
    3,115.12x = 7,384,865.45
  5. Step 5: Solve for x
    x = 7,384,865.45/3,115.12
  6. Step 6: Final answer
    x = 2,370.65

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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.