Home / 2,236.78-3,355.15-1,318.72

Finding the Fourth Proportional to 2,236.78, 3,355.15 and 1,318.72

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Solution

The fourth proportional to 2,236.78, 3,355.15 and 1,318.72 is: 1,978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,236.78 : 3,355.15 = 1,318.72 : x
  2. Step 2: Convert to fraction form
    2,236.78/3,355.15 = 1,318.72/x
  3. Step 3: Cross multiply
    2,236.78x = 3,355.15 × 1,318.72
  4. Step 4: Simplify right side
    2,236.78x = 4,424,503.41
  5. Step 5: Solve for x
    x = 4,424,503.41/2,236.78
  6. Step 6: Final answer
    x = 1,978.07

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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.