Home / 2,172.04-2,997.16-1,287.68

Finding the Fourth Proportional to 2,172.04, 2,997.16 and 1,287.68

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Solution

The fourth proportional to 2,172.04, 2,997.16 and 1,287.68 is: 1,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.04 : 2,997.16 = 1,287.68 : x
  2. Step 2: Convert to fraction form
    2,172.04/2,997.16 = 1,287.68/x
  3. Step 3: Cross multiply
    2,172.04x = 2,997.16 × 1,287.68
  4. Step 4: Simplify right side
    2,172.04x = 3,859,382.99
  5. Step 5: Solve for x
    x = 3,859,382.99/2,172.04
  6. Step 6: Final answer
    x = 1,776.85

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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.