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Finding the Fourth Proportional to 668,222.48, 1,002,231.84 and 218,990

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Solution

The fourth proportional to 668,222.48, 1,002,231.84 and 218,990 is: 328,451.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,222.48 : 1,002,231.84 = 218,990 : x
  2. Step 2: Convert to fraction form
    668,222.48/1,002,231.84 = 218,990/x
  3. Step 3: Cross multiply
    668,222.48x = 1,002,231.84 × 218,990
  4. Step 4: Simplify right side
    668,222.48x = 219,478,750,641.60
  5. Step 5: Solve for x
    x = 219,478,750,641.60/668,222.48
  6. Step 6: Final answer
    x = 328,451.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.