Home / 3,407.19-5,111.39-1,215.78

Finding the Fourth Proportional to 3,407.19, 5,111.39 and 1,215.78

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Solution

The fourth proportional to 3,407.19, 5,111.39 and 1,215.78 is: 1,823.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,407.19 : 5,111.39 = 1,215.78 : x
  2. Step 2: Convert to fraction form
    3,407.19/5,111.39 = 1,215.78/x
  3. Step 3: Cross multiply
    3,407.19x = 5,111.39 × 1,215.78
  4. Step 4: Simplify right side
    3,407.19x = 6,214,325.73
  5. Step 5: Solve for x
    x = 6,214,325.73/3,407.19
  6. Step 6: Final answer
    x = 1,823.89

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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.