Home / 2,218.56-3,325.76-1,121.60

Finding the Fourth Proportional to 2,218.56, 3,325.76 and 1,121.60

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Solution

The fourth proportional to 2,218.56, 3,325.76 and 1,121.60 is: 1,681.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.56 : 3,325.76 = 1,121.60 : x
  2. Step 2: Convert to fraction form
    2,218.56/3,325.76 = 1,121.60/x
  3. Step 3: Cross multiply
    2,218.56x = 3,325.76 × 1,121.60
  4. Step 4: Simplify right side
    2,218.56x = 3,730,172.42
  5. Step 5: Solve for x
    x = 3,730,172.42/2,218.56
  6. Step 6: Final answer
    x = 1,681.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.