Home / 1,322.20-1,984.38-1,215.64

Finding the Fourth Proportional to 1,322.20, 1,984.38 and 1,215.64

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Solution

The fourth proportional to 1,322.20, 1,984.38 and 1,215.64 is: 1,824.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.20 : 1,984.38 = 1,215.64 : x
  2. Step 2: Convert to fraction form
    1,322.20/1,984.38 = 1,215.64/x
  3. Step 3: Cross multiply
    1,322.20x = 1,984.38 × 1,215.64
  4. Step 4: Simplify right side
    1,322.20x = 2,412,291.70
  5. Step 5: Solve for x
    x = 2,412,291.70/1,322.20
  6. Step 6: Final answer
    x = 1,824.45

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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.