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Finding the Fourth Proportional to 386,388.55, 533,230.05 and 225,217.59

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Solution

The fourth proportional to 386,388.55, 533,230.05 and 225,217.59 is: 310,808.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,388.55 : 533,230.05 = 225,217.59 : x
  2. Step 2: Convert to fraction form
    386,388.55/533,230.05 = 225,217.59/x
  3. Step 3: Cross multiply
    386,388.55x = 533,230.05 × 225,217.59
  4. Step 4: Simplify right side
    386,388.55x = 120,092,786,776.58
  5. Step 5: Solve for x
    x = 120,092,786,776.58/386,388.55
  6. Step 6: Final answer
    x = 310,808.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.