Home / 2,208.40-3,312.24-727.60

Finding the Fourth Proportional to 2,208.40, 3,312.24 and 727.60

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Solution

The fourth proportional to 2,208.40, 3,312.24 and 727.60 is: 1,091.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.40 : 3,312.24 = 727.60 : x
  2. Step 2: Convert to fraction form
    2,208.40/3,312.24 = 727.60/x
  3. Step 3: Cross multiply
    2,208.40x = 3,312.24 × 727.60
  4. Step 4: Simplify right side
    2,208.40x = 2,409,985.82
  5. Step 5: Solve for x
    x = 2,409,985.82/2,208.40
  6. Step 6: Final answer
    x = 1,091.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.