Home / 2,144.32-3,216.48-911.40

Finding the Fourth Proportional to 2,144.32, 3,216.48 and 911.40

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Solution

The fourth proportional to 2,144.32, 3,216.48 and 911.40 is: 1,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,144.32 : 3,216.48 = 911.40 : x
  2. Step 2: Convert to fraction form
    2,144.32/3,216.48 = 911.40/x
  3. Step 3: Cross multiply
    2,144.32x = 3,216.48 × 911.40
  4. Step 4: Simplify right side
    2,144.32x = 2,931,499.87
  5. Step 5: Solve for x
    x = 2,931,499.87/2,144.32
  6. Step 6: Final answer
    x = 1,367.10

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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.