Home / 1,571.75-2,170.14-1,129.80

Finding the Fourth Proportional to 1,571.75, 2,170.14 and 1,129.80

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Solution

The fourth proportional to 1,571.75, 2,170.14 and 1,129.80 is: 1,559.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.75 : 2,170.14 = 1,129.80 : x
  2. Step 2: Convert to fraction form
    1,571.75/2,170.14 = 1,129.80/x
  3. Step 3: Cross multiply
    1,571.75x = 2,170.14 × 1,129.80
  4. Step 4: Simplify right side
    1,571.75x = 2,451,822.22
  5. Step 5: Solve for x
    x = 2,451,822.22/1,571.75
  6. Step 6: Final answer
    x = 1,559.93

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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.