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Finding the Fourth Proportional to 1,977.98, 2,724.97 and 1,379.38

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Solution

The fourth proportional to 1,977.98, 2,724.97 and 1,379.38 is: 1,900.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.98 : 2,724.97 = 1,379.38 : x
  2. Step 2: Convert to fraction form
    1,977.98/2,724.97 = 1,379.38/x
  3. Step 3: Cross multiply
    1,977.98x = 2,724.97 × 1,379.38
  4. Step 4: Simplify right side
    1,977.98x = 3,758,769.12
  5. Step 5: Solve for x
    x = 3,758,769.12/1,977.98
  6. Step 6: Final answer
    x = 1,900.31

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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.