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Finding the Fourth Proportional to 354,471.62, 489,334.65 and 218,529.86

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Solution

The fourth proportional to 354,471.62, 489,334.65 and 218,529.86 is: 301,672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,471.62 : 489,334.65 = 218,529.86 : x
  2. Step 2: Convert to fraction form
    354,471.62/489,334.65 = 218,529.86/x
  3. Step 3: Cross multiply
    354,471.62x = 489,334.65 × 218,529.86
  4. Step 4: Simplify right side
    354,471.62x = 106,934,232,557.65
  5. Step 5: Solve for x
    x = 106,934,232,557.65/354,471.62
  6. Step 6: Final answer
    x = 301,672.20

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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.