Home / 3,409.20-5,115.72-1,870

Finding the Fourth Proportional to 3,409.20, 5,115.72 and 1,870

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Solution

The fourth proportional to 3,409.20, 5,115.72 and 1,870 is: 2,806.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.20 : 5,115.72 = 1,870 : x
  2. Step 2: Convert to fraction form
    3,409.20/5,115.72 = 1,870/x
  3. Step 3: Cross multiply
    3,409.20x = 5,115.72 × 1,870
  4. Step 4: Simplify right side
    3,409.20x = 9,566,396.40
  5. Step 5: Solve for x
    x = 9,566,396.40/3,409.20
  6. Step 6: Final answer
    x = 2,806.05

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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.