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Finding the Fourth Proportional to 1,450.56, 2,001.46 and 861.29

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Solution

The fourth proportional to 1,450.56, 2,001.46 and 861.29 is: 1,188.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,450.56 : 2,001.46 = 861.29 : x
  2. Step 2: Convert to fraction form
    1,450.56/2,001.46 = 861.29/x
  3. Step 3: Cross multiply
    1,450.56x = 2,001.46 × 861.29
  4. Step 4: Simplify right side
    1,450.56x = 1,723,837.48
  5. Step 5: Solve for x
    x = 1,723,837.48/1,450.56
  6. Step 6: Final answer
    x = 1,188.39

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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.