Home / 2,208.64-3,312.88-669.60

Finding the Fourth Proportional to 2,208.64, 3,312.88 and 669.60

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Solution

The fourth proportional to 2,208.64, 3,312.88 and 669.60 is: 1,004.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.64 : 3,312.88 = 669.60 : x
  2. Step 2: Convert to fraction form
    2,208.64/3,312.88 = 669.60/x
  3. Step 3: Cross multiply
    2,208.64x = 3,312.88 × 669.60
  4. Step 4: Simplify right side
    2,208.64x = 2,218,304.45
  5. Step 5: Solve for x
    x = 2,218,304.45/2,208.64
  6. Step 6: Final answer
    x = 1,004.38

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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.