Home / 2,148.80-3,221.04-1,172.88

Finding the Fourth Proportional to 2,148.80, 3,221.04 and 1,172.88

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Solution

The fourth proportional to 2,148.80, 3,221.04 and 1,172.88 is: 1,758.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.80 : 3,221.04 = 1,172.88 : x
  2. Step 2: Convert to fraction form
    2,148.80/3,221.04 = 1,172.88/x
  3. Step 3: Cross multiply
    2,148.80x = 3,221.04 × 1,172.88
  4. Step 4: Simplify right side
    2,148.80x = 3,777,893.40
  5. Step 5: Solve for x
    x = 3,777,893.40/2,148.80
  6. Step 6: Final answer
    x = 1,758.14

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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.