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Finding the Fourth Proportional to 279,020.50, 385,046.39 and 151,696.09

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Solution

The fourth proportional to 279,020.50, 385,046.39 and 151,696.09 is: 209,339.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,020.50 : 385,046.39 = 151,696.09 : x
  2. Step 2: Convert to fraction form
    279,020.50/385,046.39 = 151,696.09/x
  3. Step 3: Cross multiply
    279,020.50x = 385,046.39 × 151,696.09
  4. Step 4: Simplify right side
    279,020.50x = 58,410,031,073.13
  5. Step 5: Solve for x
    x = 58,410,031,073.13/279,020.50
  6. Step 6: Final answer
    x = 209,339.57

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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.