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Finding the Fourth Proportional to 1,381.46, 1,900.53 and 1,249.02

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Solution

The fourth proportional to 1,381.46, 1,900.53 and 1,249.02 is: 1,718.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.46 : 1,900.53 = 1,249.02 : x
  2. Step 2: Convert to fraction form
    1,381.46/1,900.53 = 1,249.02/x
  3. Step 3: Cross multiply
    1,381.46x = 1,900.53 × 1,249.02
  4. Step 4: Simplify right side
    1,381.46x = 2,373,799.98
  5. Step 5: Solve for x
    x = 2,373,799.98/1,381.46
  6. Step 6: Final answer
    x = 1,718.33

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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.