Home / 2,643.14-3,965.52-911.64

Finding the Fourth Proportional to 2,643.14, 3,965.52 and 911.64

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Solution

The fourth proportional to 2,643.14, 3,965.52 and 911.64 is: 1,367.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.14 : 3,965.52 = 911.64 : x
  2. Step 2: Convert to fraction form
    2,643.14/3,965.52 = 911.64/x
  3. Step 3: Cross multiply
    2,643.14x = 3,965.52 × 911.64
  4. Step 4: Simplify right side
    2,643.14x = 3,615,126.65
  5. Step 5: Solve for x
    x = 3,615,126.65/2,643.14
  6. Step 6: Final answer
    x = 1,367.74

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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.