Home / 3,109.03-4,290.45-1,711.78

Finding the Fourth Proportional to 3,109.03, 4,290.45 and 1,711.78

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Solution

The fourth proportional to 3,109.03, 4,290.45 and 1,711.78 is: 2,362.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.03 : 4,290.45 = 1,711.78 : x
  2. Step 2: Convert to fraction form
    3,109.03/4,290.45 = 1,711.78/x
  3. Step 3: Cross multiply
    3,109.03x = 4,290.45 × 1,711.78
  4. Step 4: Simplify right side
    3,109.03x = 7,344,306.50
  5. Step 5: Solve for x
    x = 7,344,306.50/3,109.03
  6. Step 6: Final answer
    x = 2,362.25

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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.