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Finding the Fourth Proportional to 409,293.98, 613,910.98 and 128,891.42

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Solution

The fourth proportional to 409,293.98, 613,910.98 and 128,891.42 is: 193,327.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,293.98 : 613,910.98 = 128,891.42 : x
  2. Step 2: Convert to fraction form
    409,293.98/613,910.98 = 128,891.42/x
  3. Step 3: Cross multiply
    409,293.98x = 613,910.98 × 128,891.42
  4. Step 4: Simplify right side
    409,293.98x = 79,127,857,965.79
  5. Step 5: Solve for x
    x = 79,127,857,965.79/409,293.98
  6. Step 6: Final answer
    x = 193,327.69

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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.