Home / 1,351.68-1,857.28-1,222.08

Finding the Fourth Proportional to 1,351.68, 1,857.28 and 1,222.08

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Solution

The fourth proportional to 1,351.68, 1,857.28 and 1,222.08 is: 1,679.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.68 : 1,857.28 = 1,222.08 : x
  2. Step 2: Convert to fraction form
    1,351.68/1,857.28 = 1,222.08/x
  3. Step 3: Cross multiply
    1,351.68x = 1,857.28 × 1,222.08
  4. Step 4: Simplify right side
    1,351.68x = 2,269,744.74
  5. Step 5: Solve for x
    x = 2,269,744.74/1,351.68
  6. Step 6: Final answer
    x = 1,679.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.