Home / 3,109.20-4,290.54-1,711.92

Finding the Fourth Proportional to 3,109.20, 4,290.54 and 1,711.92

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Solution

The fourth proportional to 3,109.20, 4,290.54 and 1,711.92 is: 2,362.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.20 : 4,290.54 = 1,711.92 : x
  2. Step 2: Convert to fraction form
    3,109.20/4,290.54 = 1,711.92/x
  3. Step 3: Cross multiply
    3,109.20x = 4,290.54 × 1,711.92
  4. Step 4: Simplify right side
    3,109.20x = 7,345,061.24
  5. Step 5: Solve for x
    x = 7,345,061.24/3,109.20
  6. Step 6: Final answer
    x = 2,362.36

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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.