Home / 1,550.26-2,138.56-990.14

Finding the Fourth Proportional to 1,550.26, 2,138.56 and 990.14

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Solution

The fourth proportional to 1,550.26, 2,138.56 and 990.14 is: 1,365.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.26 : 2,138.56 = 990.14 : x
  2. Step 2: Convert to fraction form
    1,550.26/2,138.56 = 990.14/x
  3. Step 3: Cross multiply
    1,550.26x = 2,138.56 × 990.14
  4. Step 4: Simplify right side
    1,550.26x = 2,117,458.15
  5. Step 5: Solve for x
    x = 2,117,458.15/1,550.26
  6. Step 6: Final answer
    x = 1,365.88

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1.5x scale

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.