Home / 2,157.12-3,234.66-986.79

Finding the Fourth Proportional to 2,157.12, 3,234.66 and 986.79

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Solution

The fourth proportional to 2,157.12, 3,234.66 and 986.79 is: 1,479.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.12 : 3,234.66 = 986.79 : x
  2. Step 2: Convert to fraction form
    2,157.12/3,234.66 = 986.79/x
  3. Step 3: Cross multiply
    2,157.12x = 3,234.66 × 986.79
  4. Step 4: Simplify right side
    2,157.12x = 3,191,930.14
  5. Step 5: Solve for x
    x = 3,191,930.14/2,157.12
  6. Step 6: Final answer
    x = 1,479.72

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.