Home / 1,213.28-1,819.68-347.36

Finding the Fourth Proportional to 1,213.28, 1,819.68 and 347.36

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Solution

The fourth proportional to 1,213.28, 1,819.68 and 347.36 is: 520.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.28 : 1,819.68 = 347.36 : x
  2. Step 2: Convert to fraction form
    1,213.28/1,819.68 = 347.36/x
  3. Step 3: Cross multiply
    1,213.28x = 1,819.68 × 347.36
  4. Step 4: Simplify right side
    1,213.28x = 632,084.04
  5. Step 5: Solve for x
    x = 632,084.04/1,213.28
  6. Step 6: Final answer
    x = 520.97

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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.