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Finding the Fourth Proportional to 485,419.20, 729,003.60 and 469,672.80

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Solution

The fourth proportional to 485,419.20, 729,003.60 and 469,672.80 is: 705,355.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,419.20 : 729,003.60 = 469,672.80 : x
  2. Step 2: Convert to fraction form
    485,419.20/729,003.60 = 469,672.80/x
  3. Step 3: Cross multiply
    485,419.20x = 729,003.60 × 469,672.80
  4. Step 4: Simplify right side
    485,419.20x = 342,393,162,022.08
  5. Step 5: Solve for x
    x = 342,393,162,022.08/485,419.20
  6. Step 6: Final answer
    x = 705,355.62

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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.