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Finding the Fourth Proportional to 485,800.70, 728,722.92 and 148,816.80

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Solution

The fourth proportional to 485,800.70, 728,722.92 and 148,816.80 is: 223,231.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,800.70 : 728,722.92 = 148,816.80 : x
  2. Step 2: Convert to fraction form
    485,800.70/728,722.92 = 148,816.80/x
  3. Step 3: Cross multiply
    485,800.70x = 728,722.92 × 148,816.80
  4. Step 4: Simplify right side
    485,800.70x = 108,446,213,041.06
  5. Step 5: Solve for x
    x = 108,446,213,041.06/485,800.70
  6. Step 6: Final answer
    x = 223,231.90

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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.