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Finding the Fourth Proportional to 1,234.13, 1,703.09 and 768.65

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Solution

The fourth proportional to 1,234.13, 1,703.09 and 768.65 is: 1,060.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.13 : 1,703.09 = 768.65 : x
  2. Step 2: Convert to fraction form
    1,234.13/1,703.09 = 768.65/x
  3. Step 3: Cross multiply
    1,234.13x = 1,703.09 × 768.65
  4. Step 4: Simplify right side
    1,234.13x = 1,309,073.53
  5. Step 5: Solve for x
    x = 1,309,073.53/1,234.13
  6. Step 6: Final answer
    x = 1,060.73

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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.