Home / 1,222.20-1,833.30-874.80

Finding the Fourth Proportional to 1,222.20, 1,833.30 and 874.80

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Solution

The fourth proportional to 1,222.20, 1,833.30 and 874.80 is: 1,312.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.20 : 1,833.30 = 874.80 : x
  2. Step 2: Convert to fraction form
    1,222.20/1,833.30 = 874.80/x
  3. Step 3: Cross multiply
    1,222.20x = 1,833.30 × 874.80
  4. Step 4: Simplify right side
    1,222.20x = 1,603,770.84
  5. Step 5: Solve for x
    x = 1,603,770.84/1,222.20
  6. Step 6: Final answer
    x = 1,312.20

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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.