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Finding the Fourth Proportional to 2,694.90, 3,717.74 and 1,947.68

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Solution

The fourth proportional to 2,694.90, 3,717.74 and 1,947.68 is: 2,686.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,694.90 : 3,717.74 = 1,947.68 : x
  2. Step 2: Convert to fraction form
    2,694.90/3,717.74 = 1,947.68/x
  3. Step 3: Cross multiply
    2,694.90x = 3,717.74 × 1,947.68
  4. Step 4: Simplify right side
    2,694.90x = 7,240,967.84
  5. Step 5: Solve for x
    x = 7,240,967.84/2,694.90
  6. Step 6: Final answer
    x = 2,686.92

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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.