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Finding the Fourth Proportional to 1,449.95, 2,001.24 and 890.71

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Solution

The fourth proportional to 1,449.95, 2,001.24 and 890.71 is: 1,229.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.95 : 2,001.24 = 890.71 : x
  2. Step 2: Convert to fraction form
    1,449.95/2,001.24 = 890.71/x
  3. Step 3: Cross multiply
    1,449.95x = 2,001.24 × 890.71
  4. Step 4: Simplify right side
    1,449.95x = 1,782,519.48
  5. Step 5: Solve for x
    x = 1,782,519.48/1,449.95
  6. Step 6: Final answer
    x = 1,229.37

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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.