Home / 2,172.02-2,997.28-1,275.64

Finding the Fourth Proportional to 2,172.02, 2,997.28 and 1,275.64

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Solution

The fourth proportional to 2,172.02, 2,997.28 and 1,275.64 is: 1,760.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.02 : 2,997.28 = 1,275.64 : x
  2. Step 2: Convert to fraction form
    2,172.02/2,997.28 = 1,275.64/x
  3. Step 3: Cross multiply
    2,172.02x = 2,997.28 × 1,275.64
  4. Step 4: Simplify right side
    2,172.02x = 3,823,450.26
  5. Step 5: Solve for x
    x = 3,823,450.26/2,172.02
  6. Step 6: Final answer
    x = 1,760.32

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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.