Home / 3,407.20-5,111.70-1,215.70

Finding the Fourth Proportional to 3,407.20, 5,111.70 and 1,215.70

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Solution

The fourth proportional to 3,407.20, 5,111.70 and 1,215.70 is: 1,823.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,407.20 : 5,111.70 = 1,215.70 : x
  2. Step 2: Convert to fraction form
    3,407.20/5,111.70 = 1,215.70/x
  3. Step 3: Cross multiply
    3,407.20x = 5,111.70 × 1,215.70
  4. Step 4: Simplify right side
    3,407.20x = 6,214,293.69
  5. Step 5: Solve for x
    x = 6,214,293.69/3,407.20
  6. Step 6: Final answer
    x = 1,823.87

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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.