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Finding the Fourth Proportional to 1,914.87, 2,872.05 and 744.36

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Solution

The fourth proportional to 1,914.87, 2,872.05 and 744.36 is: 1,116.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.87 : 2,872.05 = 744.36 : x
  2. Step 2: Convert to fraction form
    1,914.87/2,872.05 = 744.36/x
  3. Step 3: Cross multiply
    1,914.87x = 2,872.05 × 744.36
  4. Step 4: Simplify right side
    1,914.87x = 2,137,839.14
  5. Step 5: Solve for x
    x = 2,137,839.14/1,914.87
  6. Step 6: Final answer
    x = 1,116.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.