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Finding the Fourth Proportional to 419,901.60, 630,046.80 and 220,447.20

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Solution

The fourth proportional to 419,901.60, 630,046.80 and 220,447.20 is: 330,772.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,901.60 : 630,046.80 = 220,447.20 : x
  2. Step 2: Convert to fraction form
    419,901.60/630,046.80 = 220,447.20/x
  3. Step 3: Cross multiply
    419,901.60x = 630,046.80 × 220,447.20
  4. Step 4: Simplify right side
    419,901.60x = 138,892,052,928.96
  5. Step 5: Solve for x
    x = 138,892,052,928.96/419,901.60
  6. Step 6: Final answer
    x = 330,772.86

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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.