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Finding the Fourth Proportional to 1,226.80, 1,691.32 and 833.14

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Solution

The fourth proportional to 1,226.80, 1,691.32 and 833.14 is: 1,148.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.80 : 1,691.32 = 833.14 : x
  2. Step 2: Convert to fraction form
    1,226.80/1,691.32 = 833.14/x
  3. Step 3: Cross multiply
    1,226.80x = 1,691.32 × 833.14
  4. Step 4: Simplify right side
    1,226.80x = 1,409,093.72
  5. Step 5: Solve for x
    x = 1,409,093.72/1,226.80
  6. Step 6: Final answer
    x = 1,148.60

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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.