Home / 2,311.20-3,482.40-1,909.34

Finding the Fourth Proportional to 2,311.20, 3,482.40 and 1,909.34

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Solution

The fourth proportional to 2,311.20, 3,482.40 and 1,909.34 is: 2,876.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.20 : 3,482.40 = 1,909.34 : x
  2. Step 2: Convert to fraction form
    2,311.20/3,482.40 = 1,909.34/x
  3. Step 3: Cross multiply
    2,311.20x = 3,482.40 × 1,909.34
  4. Step 4: Simplify right side
    2,311.20x = 6,649,058.66
  5. Step 5: Solve for x
    x = 6,649,058.66/2,311.20
  6. Step 6: Final answer
    x = 2,876.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.