Home / 1,550.28-2,139.38-851.64

Finding the Fourth Proportional to 1,550.28, 2,139.38 and 851.64

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Solution

The fourth proportional to 1,550.28, 2,139.38 and 851.64 is: 1,175.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.28 : 2,139.38 = 851.64 : x
  2. Step 2: Convert to fraction form
    1,550.28/2,139.38 = 851.64/x
  3. Step 3: Cross multiply
    1,550.28x = 2,139.38 × 851.64
  4. Step 4: Simplify right side
    1,550.28x = 1,821,981.58
  5. Step 5: Solve for x
    x = 1,821,981.58/1,550.28
  6. Step 6: Final answer
    x = 1,175.26

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Half scale
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Double scale
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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.