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Finding the Fourth Proportional to 1,967.28, 2,715.28 and 1,338.16

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Solution

The fourth proportional to 1,967.28, 2,715.28 and 1,338.16 is: 1,846.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,967.28 : 2,715.28 = 1,338.16 : x
  2. Step 2: Convert to fraction form
    1,967.28/2,715.28 = 1,338.16/x
  3. Step 3: Cross multiply
    1,967.28x = 2,715.28 × 1,338.16
  4. Step 4: Simplify right side
    1,967.28x = 3,633,479.08
  5. Step 5: Solve for x
    x = 3,633,479.08/1,967.28
  6. Step 6: Final answer
    x = 1,846.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.