Home / 1,213.28-1,819.08-636.56

Finding the Fourth Proportional to 1,213.28, 1,819.08 and 636.56

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Solution

The fourth proportional to 1,213.28, 1,819.08 and 636.56 is: 954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.28 : 1,819.08 = 636.56 : x
  2. Step 2: Convert to fraction form
    1,213.28/1,819.08 = 636.56/x
  3. Step 3: Cross multiply
    1,213.28x = 1,819.08 × 636.56
  4. Step 4: Simplify right side
    1,213.28x = 1,157,953.56
  5. Step 5: Solve for x
    x = 1,157,953.56/1,213.28
  6. Step 6: Final answer
    x = 954.40

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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.