Home / 1,221.30-1,832.26-355.70

Finding the Fourth Proportional to 1,221.30, 1,832.26 and 355.70

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Solution

The fourth proportional to 1,221.30, 1,832.26 and 355.70 is: 533.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.30 : 1,832.26 = 355.70 : x
  2. Step 2: Convert to fraction form
    1,221.30/1,832.26 = 355.70/x
  3. Step 3: Cross multiply
    1,221.30x = 1,832.26 × 355.70
  4. Step 4: Simplify right side
    1,221.30x = 651,734.88
  5. Step 5: Solve for x
    x = 651,734.88/1,221.30
  6. Step 6: Final answer
    x = 533.64

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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.