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Finding the Fourth Proportional to 1,891.84, 2,839.20 and 737.68

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Solution

The fourth proportional to 1,891.84, 2,839.20 and 737.68 is: 1,107.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.84 : 2,839.20 = 737.68 : x
  2. Step 2: Convert to fraction form
    1,891.84/2,839.20 = 737.68/x
  3. Step 3: Cross multiply
    1,891.84x = 2,839.20 × 737.68
  4. Step 4: Simplify right side
    1,891.84x = 2,094,421.06
  5. Step 5: Solve for x
    x = 2,094,421.06/1,891.84
  6. Step 6: Final answer
    x = 1,107.08

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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.