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Finding the Fourth Proportional to 235,965.20, 353,947.80 and 220,218.80

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Solution

The fourth proportional to 235,965.20, 353,947.80 and 220,218.80 is: 330,328.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,965.20 : 353,947.80 = 220,218.80 : x
  2. Step 2: Convert to fraction form
    235,965.20/353,947.80 = 220,218.80/x
  3. Step 3: Cross multiply
    235,965.20x = 353,947.80 × 220,218.80
  4. Step 4: Simplify right side
    235,965.20x = 77,945,959,778.64
  5. Step 5: Solve for x
    x = 77,945,959,778.64/235,965.20
  6. Step 6: Final answer
    x = 330,328.20

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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.