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Finding the Fourth Proportional to 259,504.88, 389,313.84 and 79,590.40

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Solution

The fourth proportional to 259,504.88, 389,313.84 and 79,590.40 is: 119,402.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,504.88 : 389,313.84 = 79,590.40 : x
  2. Step 2: Convert to fraction form
    259,504.88/389,313.84 = 79,590.40/x
  3. Step 3: Cross multiply
    259,504.88x = 389,313.84 × 79,590.40
  4. Step 4: Simplify right side
    259,504.88x = 30,985,644,251.14
  5. Step 5: Solve for x
    x = 30,985,644,251.14/259,504.88
  6. Step 6: Final answer
    x = 119,402.93

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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.