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Finding the Fourth Proportional to 1,343.83, 1,850.25 and 1,220.80

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Solution

The fourth proportional to 1,343.83, 1,850.25 and 1,220.80 is: 1,680.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.83 : 1,850.25 = 1,220.80 : x
  2. Step 2: Convert to fraction form
    1,343.83/1,850.25 = 1,220.80/x
  3. Step 3: Cross multiply
    1,343.83x = 1,850.25 × 1,220.80
  4. Step 4: Simplify right side
    1,343.83x = 2,258,785.20
  5. Step 5: Solve for x
    x = 2,258,785.20/1,343.83
  6. Step 6: Final answer
    x = 1,680.86

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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.