Home / 1,550.25-2,139.35-851.63

Finding the Fourth Proportional to 1,550.25, 2,139.35 and 851.63

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Solution

The fourth proportional to 1,550.25, 2,139.35 and 851.63 is: 1,175.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.25 : 2,139.35 = 851.63 : x
  2. Step 2: Convert to fraction form
    1,550.25/2,139.35 = 851.63/x
  3. Step 3: Cross multiply
    1,550.25x = 2,139.35 × 851.63
  4. Step 4: Simplify right side
    1,550.25x = 1,821,919.69
  5. Step 5: Solve for x
    x = 1,821,919.69/1,550.25
  6. Step 6: Final answer
    x = 1,175.24

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Half scale
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Double scale
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Similar ratio
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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.