Home / 3,110.34-4,665.96-918.78

Finding the Fourth Proportional to 3,110.34, 4,665.96 and 918.78

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Solution

The fourth proportional to 3,110.34, 4,665.96 and 918.78 is: 1,378.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.34 : 4,665.96 = 918.78 : x
  2. Step 2: Convert to fraction form
    3,110.34/4,665.96 = 918.78/x
  3. Step 3: Cross multiply
    3,110.34x = 4,665.96 × 918.78
  4. Step 4: Simplify right side
    3,110.34x = 4,286,990.73
  5. Step 5: Solve for x
    x = 4,286,990.73/3,110.34
  6. Step 6: Final answer
    x = 1,378.30

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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.