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Finding the Fourth Proportional to 1,226.33, 1,839.80 and 670.77

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Solution

The fourth proportional to 1,226.33, 1,839.80 and 670.77 is: 1,006.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.33 : 1,839.80 = 670.77 : x
  2. Step 2: Convert to fraction form
    1,226.33/1,839.80 = 670.77/x
  3. Step 3: Cross multiply
    1,226.33x = 1,839.80 × 670.77
  4. Step 4: Simplify right side
    1,226.33x = 1,234,082.65
  5. Step 5: Solve for x
    x = 1,234,082.65/1,226.33
  6. Step 6: Final answer
    x = 1,006.32

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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.