Home / 3,407.40-5,111.10-1,947.78

Finding the Fourth Proportional to 3,407.40, 5,111.10 and 1,947.78

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Solution

The fourth proportional to 3,407.40, 5,111.10 and 1,947.78 is: 2,921.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,407.40 : 5,111.10 = 1,947.78 : x
  2. Step 2: Convert to fraction form
    3,407.40/5,111.10 = 1,947.78/x
  3. Step 3: Cross multiply
    3,407.40x = 5,111.10 × 1,947.78
  4. Step 4: Simplify right side
    3,407.40x = 9,955,298.36
  5. Step 5: Solve for x
    x = 9,955,298.36/3,407.40
  6. Step 6: Final answer
    x = 2,921.67

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Double scale
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Similar ratio
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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.