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Finding the Fourth Proportional to 285,949.79, 394,658.01 and 158,666.39

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Solution

The fourth proportional to 285,949.79, 394,658.01 and 158,666.39 is: 218,985.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,949.79 : 394,658.01 = 158,666.39 : x
  2. Step 2: Convert to fraction form
    285,949.79/394,658.01 = 158,666.39/x
  3. Step 3: Cross multiply
    285,949.79x = 394,658.01 × 158,666.39
  4. Step 4: Simplify right side
    285,949.79x = 62,618,959,757.99
  5. Step 5: Solve for x
    x = 62,618,959,757.99/285,949.79
  6. Step 6: Final answer
    x = 218,985.86

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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.