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Finding the Fourth Proportional to 1,226.08, 1,691.84 and 674.08

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Solution

The fourth proportional to 1,226.08, 1,691.84 and 674.08 is: 930.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.08 : 1,691.84 = 674.08 : x
  2. Step 2: Convert to fraction form
    1,226.08/1,691.84 = 674.08/x
  3. Step 3: Cross multiply
    1,226.08x = 1,691.84 × 674.08
  4. Step 4: Simplify right side
    1,226.08x = 1,140,435.51
  5. Step 5: Solve for x
    x = 1,140,435.51/1,226.08
  6. Step 6: Final answer
    x = 930.15

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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.