Home / 2,172.83-2,998.43-1,288.11

Finding the Fourth Proportional to 2,172.83, 2,998.43 and 1,288.11

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Solution

The fourth proportional to 2,172.83, 2,998.43 and 1,288.11 is: 1,777.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.83 : 2,998.43 = 1,288.11 : x
  2. Step 2: Convert to fraction form
    2,172.83/2,998.43 = 1,288.11/x
  3. Step 3: Cross multiply
    2,172.83x = 2,998.43 × 1,288.11
  4. Step 4: Simplify right side
    2,172.83x = 3,862,307.67
  5. Step 5: Solve for x
    x = 3,862,307.67/2,172.83
  6. Step 6: Final answer
    x = 1,777.55

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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.