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Finding the Fourth Proportional to 245,342.70, 368,998.20 and 219,754.80

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Solution

The fourth proportional to 245,342.70, 368,998.20 and 219,754.80 is: 330,513.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,342.70 : 368,998.20 = 219,754.80 : x
  2. Step 2: Convert to fraction form
    245,342.70/368,998.20 = 219,754.80/x
  3. Step 3: Cross multiply
    245,342.70x = 368,998.20 × 219,754.80
  4. Step 4: Simplify right side
    245,342.70x = 81,089,125,641.36
  5. Step 5: Solve for x
    x = 81,089,125,641.36/245,342.70
  6. Step 6: Final answer
    x = 330,513.71

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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.