Home / 1,571.19-2,168.16-862.90

Finding the Fourth Proportional to 1,571.19, 2,168.16 and 862.90

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Solution

The fourth proportional to 1,571.19, 2,168.16 and 862.90 is: 1,190.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.19 : 2,168.16 = 862.90 : x
  2. Step 2: Convert to fraction form
    1,571.19/2,168.16 = 862.90/x
  3. Step 3: Cross multiply
    1,571.19x = 2,168.16 × 862.90
  4. Step 4: Simplify right side
    1,571.19x = 1,870,899.84
  5. Step 5: Solve for x
    x = 1,870,899.84/1,571.19
  6. Step 6: Final answer
    x = 1,190.75

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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.