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Finding the Fourth Proportional to 1,372.78, 2,050.61 and 1,063.90

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Solution

The fourth proportional to 1,372.78, 2,050.61 and 1,063.90 is: 1,589.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.78 : 2,050.61 = 1,063.90 : x
  2. Step 2: Convert to fraction form
    1,372.78/2,050.61 = 1,063.90/x
  3. Step 3: Cross multiply
    1,372.78x = 2,050.61 × 1,063.90
  4. Step 4: Simplify right side
    1,372.78x = 2,181,643.98
  5. Step 5: Solve for x
    x = 2,181,643.98/1,372.78
  6. Step 6: Final answer
    x = 1,589.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.