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Finding the Fourth Proportional to 245,889.20, 368,542.20 and 220,811.60

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Solution

The fourth proportional to 245,889.20, 368,542.20 and 220,811.60 is: 330,955.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,889.20 : 368,542.20 = 220,811.60 : x
  2. Step 2: Convert to fraction form
    245,889.20/368,542.20 = 220,811.60/x
  3. Step 3: Cross multiply
    245,889.20x = 368,542.20 × 220,811.60
  4. Step 4: Simplify right side
    245,889.20x = 81,378,392,849.52
  5. Step 5: Solve for x
    x = 81,378,392,849.52/245,889.20
  6. Step 6: Final answer
    x = 330,955.54

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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.