Home / 1,276.33-1,763.45-1,135.19

Finding the Fourth Proportional to 1,276.33, 1,763.45 and 1,135.19

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Solution

The fourth proportional to 1,276.33, 1,763.45 and 1,135.19 is: 1,568.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.33 : 1,763.45 = 1,135.19 : x
  2. Step 2: Convert to fraction form
    1,276.33/1,763.45 = 1,135.19/x
  3. Step 3: Cross multiply
    1,276.33x = 1,763.45 × 1,135.19
  4. Step 4: Simplify right side
    1,276.33x = 2,001,850.81
  5. Step 5: Solve for x
    x = 2,001,850.81/1,276.33
  6. Step 6: Final answer
    x = 1,568.44

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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.