Home / 3,411.90-5,117.85-1,220.70

Finding the Fourth Proportional to 3,411.90, 5,117.85 and 1,220.70

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Solution

The fourth proportional to 3,411.90, 5,117.85 and 1,220.70 is: 1,831.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,411.90 : 5,117.85 = 1,220.70 : x
  2. Step 2: Convert to fraction form
    3,411.90/5,117.85 = 1,220.70/x
  3. Step 3: Cross multiply
    3,411.90x = 5,117.85 × 1,220.70
  4. Step 4: Simplify right side
    3,411.90x = 6,247,359.50
  5. Step 5: Solve for x
    x = 6,247,359.50/3,411.90
  6. Step 6: Final answer
    x = 1,831.05

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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.