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Finding the Fourth Proportional to 259,499.88, 389,306.28 and 79,585.38

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Solution

The fourth proportional to 259,499.88, 389,306.28 and 79,585.38 is: 119,395.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,499.88 : 389,306.28 = 79,585.38 : x
  2. Step 2: Convert to fraction form
    259,499.88/389,306.28 = 79,585.38/x
  3. Step 3: Cross multiply
    259,499.88x = 389,306.28 × 79,585.38
  4. Step 4: Simplify right side
    259,499.88x = 30,983,088,230.19
  5. Step 5: Solve for x
    x = 30,983,088,230.19/259,499.88
  6. Step 6: Final answer
    x = 119,395.39

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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.