Home / 1,571.31-2,168.10-1,011.64

Finding the Fourth Proportional to 1,571.31, 2,168.10 and 1,011.64

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Solution

The fourth proportional to 1,571.31, 2,168.10 and 1,011.64 is: 1,395.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.31 : 2,168.10 = 1,011.64 : x
  2. Step 2: Convert to fraction form
    1,571.31/2,168.10 = 1,011.64/x
  3. Step 3: Cross multiply
    1,571.31x = 2,168.10 × 1,011.64
  4. Step 4: Simplify right side
    1,571.31x = 2,193,336.68
  5. Step 5: Solve for x
    x = 2,193,336.68/1,571.31
  6. Step 6: Final answer
    x = 1,395.87

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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.