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Finding the Fourth Proportional to 354,569.05, 489,414.45 and 218,645.65

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Solution

The fourth proportional to 354,569.05, 489,414.45 and 218,645.65 is: 301,798.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,569.05 : 489,414.45 = 218,645.65 : x
  2. Step 2: Convert to fraction form
    354,569.05/489,414.45 = 218,645.65/x
  3. Step 3: Cross multiply
    354,569.05x = 489,414.45 × 218,645.65
  4. Step 4: Simplify right side
    354,569.05x = 107,008,340,539.64
  5. Step 5: Solve for x
    x = 107,008,340,539.64/354,569.05
  6. Step 6: Final answer
    x = 301,798.31

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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.