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Finding the Fourth Proportional to 258,882.86, 388,346.46 and 79,008.79

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Solution

The fourth proportional to 258,882.86, 388,346.46 and 79,008.79 is: 118,519.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,882.86 : 388,346.46 = 79,008.79 : x
  2. Step 2: Convert to fraction form
    258,882.86/388,346.46 = 79,008.79/x
  3. Step 3: Cross multiply
    258,882.86x = 388,346.46 × 79,008.79
  4. Step 4: Simplify right side
    258,882.86x = 30,682,782,638.23
  5. Step 5: Solve for x
    x = 30,682,782,638.23/258,882.86
  6. Step 6: Final answer
    x = 118,519.95

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1.5x scale

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.