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Finding the Fourth Proportional to 259,864.72, 389,834 and 79,965.04

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Solution

The fourth proportional to 259,864.72, 389,834 and 79,965.04 is: 119,958.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,864.72 : 389,834 = 79,965.04 : x
  2. Step 2: Convert to fraction form
    259,864.72/389,834 = 79,965.04/x
  3. Step 3: Cross multiply
    259,864.72x = 389,834 × 79,965.04
  4. Step 4: Simplify right side
    259,864.72x = 31,173,091,403.36
  5. Step 5: Solve for x
    x = 31,173,091,403.36/259,864.72
  6. Step 6: Final answer
    x = 119,958.92

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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.