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Finding the Fourth Proportional to 1,226.71, 1,839.21 and 836.74

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Solution

The fourth proportional to 1,226.71, 1,839.21 and 836.74 is: 1,254.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.71 : 1,839.21 = 836.74 : x
  2. Step 2: Convert to fraction form
    1,226.71/1,839.21 = 836.74/x
  3. Step 3: Cross multiply
    1,226.71x = 1,839.21 × 836.74
  4. Step 4: Simplify right side
    1,226.71x = 1,538,940.58
  5. Step 5: Solve for x
    x = 1,538,940.58/1,226.71
  6. Step 6: Final answer
    x = 1,254.53

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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.