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Finding the Fourth Proportional to 2,696.74, 3,711.87 and 1,909.42

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Solution

The fourth proportional to 2,696.74, 3,711.87 and 1,909.42 is: 2,628.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,696.74 : 3,711.87 = 1,909.42 : x
  2. Step 2: Convert to fraction form
    2,696.74/3,711.87 = 1,909.42/x
  3. Step 3: Cross multiply
    2,696.74x = 3,711.87 × 1,909.42
  4. Step 4: Simplify right side
    2,696.74x = 7,087,518.82
  5. Step 5: Solve for x
    x = 7,087,518.82/2,696.74
  6. Step 6: Final answer
    x = 2,628.18

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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.