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Finding the Fourth Proportional to 354,473.62, 489,337.41 and 218,531.86

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Solution

The fourth proportional to 354,473.62, 489,337.41 and 218,531.86 is: 301,674.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,473.62 : 489,337.41 = 218,531.86 : x
  2. Step 2: Convert to fraction form
    354,473.62/489,337.41 = 218,531.86/x
  3. Step 3: Cross multiply
    354,473.62x = 489,337.41 × 218,531.86
  4. Step 4: Simplify right side
    354,473.62x = 106,935,814,374.88
  5. Step 5: Solve for x
    x = 106,935,814,374.88/354,473.62
  6. Step 6: Final answer
    x = 301,674.96

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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.