Home / 1,571.20-2,168.64-1,011.52

Finding the Fourth Proportional to 1,571.20, 2,168.64 and 1,011.52

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Solution

The fourth proportional to 1,571.20, 2,168.64 and 1,011.52 is: 1,396.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.20 : 2,168.64 = 1,011.52 : x
  2. Step 2: Convert to fraction form
    1,571.20/2,168.64 = 1,011.52/x
  3. Step 3: Cross multiply
    1,571.20x = 2,168.64 × 1,011.52
  4. Step 4: Simplify right side
    1,571.20x = 2,193,622.73
  5. Step 5: Solve for x
    x = 2,193,622.73/1,571.20
  6. Step 6: Final answer
    x = 1,396.14

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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.