Home / 1,571.20-2,166.96-1,200.28

Finding the Fourth Proportional to 1,571.20, 2,166.96 and 1,200.28

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Solution

The fourth proportional to 1,571.20, 2,166.96 and 1,200.28 is: 1,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.20 : 2,166.96 = 1,200.28 : x
  2. Step 2: Convert to fraction form
    1,571.20/2,166.96 = 1,200.28/x
  3. Step 3: Cross multiply
    1,571.20x = 2,166.96 × 1,200.28
  4. Step 4: Simplify right side
    1,571.20x = 2,600,958.75
  5. Step 5: Solve for x
    x = 2,600,958.75/1,571.20
  6. Step 6: Final answer
    x = 1,655.40

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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.