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Finding the Fourth Proportional to 284,707.78, 392,881.39 and 157,375.78

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Solution

The fourth proportional to 284,707.78, 392,881.39 and 157,375.78 is: 217,170.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,707.78 : 392,881.39 = 157,375.78 : x
  2. Step 2: Convert to fraction form
    284,707.78/392,881.39 = 157,375.78/x
  3. Step 3: Cross multiply
    284,707.78x = 392,881.39 × 157,375.78
  4. Step 4: Simplify right side
    284,707.78x = 61,830,015,198.73
  5. Step 5: Solve for x
    x = 61,830,015,198.73/284,707.78
  6. Step 6: Final answer
    x = 217,170.09

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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.