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Finding the Fourth Proportional to 1,234.28, 1,703.33 and 674.77

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Solution

The fourth proportional to 1,234.28, 1,703.33 and 674.77 is: 931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.28 : 1,703.33 = 674.77 : x
  2. Step 2: Convert to fraction form
    1,234.28/1,703.33 = 674.77/x
  3. Step 3: Cross multiply
    1,234.28x = 1,703.33 × 674.77
  4. Step 4: Simplify right side
    1,234.28x = 1,149,355.98
  5. Step 5: Solve for x
    x = 1,149,355.98/1,234.28
  6. Step 6: Final answer
    x = 931.20

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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.