Home / 2,611.18-3,913.80-1,223.20

Finding the Fourth Proportional to 2,611.18, 3,913.80 and 1,223.20

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Solution

The fourth proportional to 2,611.18, 3,913.80 and 1,223.20 is: 1,833.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.18 : 3,913.80 = 1,223.20 : x
  2. Step 2: Convert to fraction form
    2,611.18/3,913.80 = 1,223.20/x
  3. Step 3: Cross multiply
    2,611.18x = 3,913.80 × 1,223.20
  4. Step 4: Simplify right side
    2,611.18x = 4,787,360.16
  5. Step 5: Solve for x
    x = 4,787,360.16/2,611.18
  6. Step 6: Final answer
    x = 1,833.41

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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.