Home / 1,550.15-2,138.26-920.26

Finding the Fourth Proportional to 1,550.15, 2,138.26 and 920.26

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Solution

The fourth proportional to 1,550.15, 2,138.26 and 920.26 is: 1,269.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.15 : 2,138.26 = 920.26 : x
  2. Step 2: Convert to fraction form
    1,550.15/2,138.26 = 920.26/x
  3. Step 3: Cross multiply
    1,550.15x = 2,138.26 × 920.26
  4. Step 4: Simplify right side
    1,550.15x = 1,967,739.86
  5. Step 5: Solve for x
    x = 1,967,739.86/1,550.15
  6. Step 6: Final answer
    x = 1,269.39

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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.