Home / 3,115.80-4,299.10-1,788.80

Finding the Fourth Proportional to 3,115.80, 4,299.10 and 1,788.80

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Solution

The fourth proportional to 3,115.80, 4,299.10 and 1,788.80 is: 2,468.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.80 : 4,299.10 = 1,788.80 : x
  2. Step 2: Convert to fraction form
    3,115.80/4,299.10 = 1,788.80/x
  3. Step 3: Cross multiply
    3,115.80x = 4,299.10 × 1,788.80
  4. Step 4: Simplify right side
    3,115.80x = 7,690,230.08
  5. Step 5: Solve for x
    x = 7,690,230.08/3,115.80
  6. Step 6: Final answer
    x = 2,468.14

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1.5x scale

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.