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Finding the Fourth Proportional to 1,234.62, 1,704.86 and 862.37

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Solution

The fourth proportional to 1,234.62, 1,704.86 and 862.37 is: 1,190.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.62 : 1,704.86 = 862.37 : x
  2. Step 2: Convert to fraction form
    1,234.62/1,704.86 = 862.37/x
  3. Step 3: Cross multiply
    1,234.62x = 1,704.86 × 862.37
  4. Step 4: Simplify right side
    1,234.62x = 1,470,207.28
  5. Step 5: Solve for x
    x = 1,470,207.28/1,234.62
  6. Step 6: Final answer
    x = 1,190.82

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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.