Home / 1,213.06-1,819.75-391.14

Finding the Fourth Proportional to 1,213.06, 1,819.75 and 391.14

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Solution

The fourth proportional to 1,213.06, 1,819.75 and 391.14 is: 586.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.06 : 1,819.75 = 391.14 : x
  2. Step 2: Convert to fraction form
    1,213.06/1,819.75 = 391.14/x
  3. Step 3: Cross multiply
    1,213.06x = 1,819.75 × 391.14
  4. Step 4: Simplify right side
    1,213.06x = 711,767.92
  5. Step 5: Solve for x
    x = 711,767.92/1,213.06
  6. Step 6: Final answer
    x = 586.75

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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.