Home / 1,074.06-1,481.78-631.80

Finding the Fourth Proportional to 1,074.06, 1,481.78 and 631.80

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Solution

The fourth proportional to 1,074.06, 1,481.78 and 631.80 is: 871.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.06 : 1,481.78 = 631.80 : x
  2. Step 2: Convert to fraction form
    1,074.06/1,481.78 = 631.80/x
  3. Step 3: Cross multiply
    1,074.06x = 1,481.78 × 631.80
  4. Step 4: Simplify right side
    1,074.06x = 936,190.18
  5. Step 5: Solve for x
    x = 936,190.18/1,074.06
  6. Step 6: Final answer
    x = 871.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.