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Finding the Fourth Proportional to 2,687.34, 3,703.41 and 1,939.92

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Solution

The fourth proportional to 2,687.34, 3,703.41 and 1,939.92 is: 2,673.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.34 : 3,703.41 = 1,939.92 : x
  2. Step 2: Convert to fraction form
    2,687.34/3,703.41 = 1,939.92/x
  3. Step 3: Cross multiply
    2,687.34x = 3,703.41 × 1,939.92
  4. Step 4: Simplify right side
    2,687.34x = 7,184,319.13
  5. Step 5: Solve for x
    x = 7,184,319.13/2,687.34
  6. Step 6: Final answer
    x = 2,673.39

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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.