Home / 2,172.70-2,996.98-1,287.88

Finding the Fourth Proportional to 2,172.70, 2,996.98 and 1,287.88

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Solution

The fourth proportional to 2,172.70, 2,996.98 and 1,287.88 is: 1,776.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.70 : 2,996.98 = 1,287.88 : x
  2. Step 2: Convert to fraction form
    2,172.70/2,996.98 = 1,287.88/x
  3. Step 3: Cross multiply
    2,172.70x = 2,996.98 × 1,287.88
  4. Step 4: Simplify right side
    2,172.70x = 3,859,750.60
  5. Step 5: Solve for x
    x = 3,859,750.60/2,172.70
  6. Step 6: Final answer
    x = 1,776.48

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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.