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Finding the Fourth Proportional to 1,480.56, 2,043.30 and 891

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Solution

The fourth proportional to 1,480.56, 2,043.30 and 891 is: 1,229.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.56 : 2,043.30 = 891 : x
  2. Step 2: Convert to fraction form
    1,480.56/2,043.30 = 891/x
  3. Step 3: Cross multiply
    1,480.56x = 2,043.30 × 891
  4. Step 4: Simplify right side
    1,480.56x = 1,820,580.30
  5. Step 5: Solve for x
    x = 1,820,580.30/1,480.56
  6. Step 6: Final answer
    x = 1,229.66

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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.