Home / 1,381.56-2,072.34-1,297.08

Finding the Fourth Proportional to 1,381.56, 2,072.34 and 1,297.08

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Solution

The fourth proportional to 1,381.56, 2,072.34 and 1,297.08 is: 1,945.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.56 : 2,072.34 = 1,297.08 : x
  2. Step 2: Convert to fraction form
    1,381.56/2,072.34 = 1,297.08/x
  3. Step 3: Cross multiply
    1,381.56x = 2,072.34 × 1,297.08
  4. Step 4: Simplify right side
    1,381.56x = 2,687,990.77
  5. Step 5: Solve for x
    x = 2,687,990.77/1,381.56
  6. Step 6: Final answer
    x = 1,945.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.