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Finding the Fourth Proportional to 386,213.60, 579,320.40 and 238,552.80

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Solution

The fourth proportional to 386,213.60, 579,320.40 and 238,552.80 is: 357,829.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,213.60 : 579,320.40 = 238,552.80 : x
  2. Step 2: Convert to fraction form
    386,213.60/579,320.40 = 238,552.80/x
  3. Step 3: Cross multiply
    386,213.60x = 579,320.40 × 238,552.80
  4. Step 4: Simplify right side
    386,213.60x = 138,198,503,517.12
  5. Step 5: Solve for x
    x = 138,198,503,517.12/386,213.60
  6. Step 6: Final answer
    x = 357,829.20

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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.