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Finding the Fourth Proportional to 1,589.31, 2,193.44 and 890.55

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Solution

The fourth proportional to 1,589.31, 2,193.44 and 890.55 is: 1,229.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.31 : 2,193.44 = 890.55 : x
  2. Step 2: Convert to fraction form
    1,589.31/2,193.44 = 890.55/x
  3. Step 3: Cross multiply
    1,589.31x = 2,193.44 × 890.55
  4. Step 4: Simplify right side
    1,589.31x = 1,953,363.54
  5. Step 5: Solve for x
    x = 1,953,363.54/1,589.31
  6. Step 6: Final answer
    x = 1,229.06

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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.