Home / 3,180.20-4,388.66-1,938.20

Finding the Fourth Proportional to 3,180.20, 4,388.66 and 1,938.20

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Solution

The fourth proportional to 3,180.20, 4,388.66 and 1,938.20 is: 2,674.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.20 : 4,388.66 = 1,938.20 : x
  2. Step 2: Convert to fraction form
    3,180.20/4,388.66 = 1,938.20/x
  3. Step 3: Cross multiply
    3,180.20x = 4,388.66 × 1,938.20
  4. Step 4: Simplify right side
    3,180.20x = 8,506,069.18
  5. Step 5: Solve for x
    x = 8,506,069.18/3,180.20
  6. Step 6: Final answer
    x = 2,674.70

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.