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Finding the Fourth Proportional to 308,884.91, 426,176.78 and 212,117.85

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Solution

The fourth proportional to 308,884.91, 426,176.78 and 212,117.85 is: 292,664.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,884.91 : 426,176.78 = 212,117.85 : x
  2. Step 2: Convert to fraction form
    308,884.91/426,176.78 = 212,117.85/x
  3. Step 3: Cross multiply
    308,884.91x = 426,176.78 × 212,117.85
  4. Step 4: Simplify right side
    308,884.91x = 90,399,701,232.93
  5. Step 5: Solve for x
    x = 90,399,701,232.93/308,884.91
  6. Step 6: Final answer
    x = 292,664.68

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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.