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Finding the Fourth Proportional to 386,380.80, 579,571.20 and 173,148.30

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Solution

The fourth proportional to 386,380.80, 579,571.20 and 173,148.30 is: 259,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,380.80 : 579,571.20 = 173,148.30 : x
  2. Step 2: Convert to fraction form
    386,380.80/579,571.20 = 173,148.30/x
  3. Step 3: Cross multiply
    386,380.80x = 579,571.20 × 173,148.30
  4. Step 4: Simplify right side
    386,380.80x = 100,351,768,008.96
  5. Step 5: Solve for x
    x = 100,351,768,008.96/386,380.80
  6. Step 6: Final answer
    x = 259,722.45

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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.