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Finding the Fourth Proportional to 290,374.09, 399,789.34 and 247,761.61

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Solution

The fourth proportional to 290,374.09, 399,789.34 and 247,761.61 is: 341,120.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,374.09 : 399,789.34 = 247,761.61 : x
  2. Step 2: Convert to fraction form
    290,374.09/399,789.34 = 247,761.61/x
  3. Step 3: Cross multiply
    290,374.09x = 399,789.34 × 247,761.61
  4. Step 4: Simplify right side
    290,374.09x = 99,052,450,539.24
  5. Step 5: Solve for x
    x = 99,052,450,539.24/290,374.09
  6. Step 6: Final answer
    x = 341,120.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.