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Finding the Fourth Proportional to 326,663, 490,121.26 and 127,123.54

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Solution

The fourth proportional to 326,663, 490,121.26 and 127,123.54 is: 190,734.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,663 : 490,121.26 = 127,123.54 : x
  2. Step 2: Convert to fraction form
    326,663/490,121.26 = 127,123.54/x
  3. Step 3: Cross multiply
    326,663x = 490,121.26 × 127,123.54
  4. Step 4: Simplify right side
    326,663x = 62,305,949,600.46
  5. Step 5: Solve for x
    x = 62,305,949,600.46/326,663
  6. Step 6: Final answer
    x = 190,734.64

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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.