Home / 1,917.14-2,645.38-1,077.80

Finding the Fourth Proportional to 1,917.14, 2,645.38 and 1,077.80

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Solution

The fourth proportional to 1,917.14, 2,645.38 and 1,077.80 is: 1,487.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.14 : 2,645.38 = 1,077.80 : x
  2. Step 2: Convert to fraction form
    1,917.14/2,645.38 = 1,077.80/x
  3. Step 3: Cross multiply
    1,917.14x = 2,645.38 × 1,077.80
  4. Step 4: Simplify right side
    1,917.14x = 2,851,190.56
  5. Step 5: Solve for x
    x = 2,851,190.56/1,917.14
  6. Step 6: Final answer
    x = 1,487.21

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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.