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Finding the Fourth Proportional to 399,345.12, 599,131.44 and 133,279.92

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Solution

The fourth proportional to 399,345.12, 599,131.44 and 133,279.92 is: 199,957.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,345.12 : 599,131.44 = 133,279.92 : x
  2. Step 2: Convert to fraction form
    399,345.12/599,131.44 = 133,279.92/x
  3. Step 3: Cross multiply
    399,345.12x = 599,131.44 × 133,279.92
  4. Step 4: Simplify right side
    399,345.12x = 79,852,190,392.68
  5. Step 5: Solve for x
    x = 79,852,190,392.68/399,345.12
  6. Step 6: Final answer
    x = 199,957.85

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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.