Home / 2,020.40-2,787.20-1,181.13

Finding the Fourth Proportional to 2,020.40, 2,787.20 and 1,181.13

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Solution

The fourth proportional to 2,020.40, 2,787.20 and 1,181.13 is: 1,629.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,020.40 : 2,787.20 = 1,181.13 : x
  2. Step 2: Convert to fraction form
    2,020.40/2,787.20 = 1,181.13/x
  3. Step 3: Cross multiply
    2,020.40x = 2,787.20 × 1,181.13
  4. Step 4: Simplify right side
    2,020.40x = 3,292,048.49
  5. Step 5: Solve for x
    x = 3,292,048.49/2,020.40
  6. Step 6: Final answer
    x = 1,629.41

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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.