Home / 1,213.29-1,819.55-628.23

Finding the Fourth Proportional to 1,213.29, 1,819.55 and 628.23

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Solution

The fourth proportional to 1,213.29, 1,819.55 and 628.23 is: 942.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.29 : 1,819.55 = 628.23 : x
  2. Step 2: Convert to fraction form
    1,213.29/1,819.55 = 628.23/x
  3. Step 3: Cross multiply
    1,213.29x = 1,819.55 × 628.23
  4. Step 4: Simplify right side
    1,213.29x = 1,143,092.76
  5. Step 5: Solve for x
    x = 1,143,092.76/1,213.29
  6. Step 6: Final answer
    x = 942.14

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1.5x scale

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.