Home / 3,409.90-5,115.89-1,218.85

Finding the Fourth Proportional to 3,409.90, 5,115.89 and 1,218.85

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Solution

The fourth proportional to 3,409.90, 5,115.89 and 1,218.85 is: 1,828.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.90 : 5,115.89 = 1,218.85 : x
  2. Step 2: Convert to fraction form
    3,409.90/5,115.89 = 1,218.85/x
  3. Step 3: Cross multiply
    3,409.90x = 5,115.89 × 1,218.85
  4. Step 4: Simplify right side
    3,409.90x = 6,235,492.78
  5. Step 5: Solve for x
    x = 6,235,492.78/3,409.90
  6. Step 6: Final answer
    x = 1,828.65

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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.