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Finding the Fourth Proportional to 386,999.70, 580,499.55 and 226,911.30

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Solution

The fourth proportional to 386,999.70, 580,499.55 and 226,911.30 is: 340,366.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,999.70 : 580,499.55 = 226,911.30 : x
  2. Step 2: Convert to fraction form
    386,999.70/580,499.55 = 226,911.30/x
  3. Step 3: Cross multiply
    386,999.70x = 580,499.55 × 226,911.30
  4. Step 4: Simplify right side
    386,999.70x = 131,721,907,539.92
  5. Step 5: Solve for x
    x = 131,721,907,539.92/386,999.70
  6. Step 6: Final answer
    x = 340,366.95

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Similar ratio
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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.