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Finding the Fourth Proportional to 354,917.31, 489,842.13 and 225,721.11

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Solution

The fourth proportional to 354,917.31, 489,842.13 and 225,721.11 is: 311,530.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,917.31 : 489,842.13 = 225,721.11 : x
  2. Step 2: Convert to fraction form
    354,917.31/489,842.13 = 225,721.11/x
  3. Step 3: Cross multiply
    354,917.31x = 489,842.13 × 225,721.11
  4. Step 4: Simplify right side
    354,917.31x = 110,567,709,308.36
  5. Step 5: Solve for x
    x = 110,567,709,308.36/354,917.31
  6. Step 6: Final answer
    x = 311,530.90

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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.