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Finding the Fourth Proportional to 343,660.80, 515,499.84 and 133,345.92

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Solution

The fourth proportional to 343,660.80, 515,499.84 and 133,345.92 is: 200,022.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,660.80 : 515,499.84 = 133,345.92 : x
  2. Step 2: Convert to fraction form
    343,660.80/515,499.84 = 133,345.92/x
  3. Step 3: Cross multiply
    343,660.80x = 515,499.84 × 133,345.92
  4. Step 4: Simplify right side
    343,660.80x = 68,739,800,424.65
  5. Step 5: Solve for x
    x = 68,739,800,424.65/343,660.80
  6. Step 6: Final answer
    x = 200,022.23

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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.