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Finding the Fourth Proportional to 485,912.40, 728,350.20 and 186,277.20

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Solution

The fourth proportional to 485,912.40, 728,350.20 and 186,277.20 is: 279,217.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,912.40 : 728,350.20 = 186,277.20 : x
  2. Step 2: Convert to fraction form
    485,912.40/728,350.20 = 186,277.20/x
  3. Step 3: Cross multiply
    485,912.40x = 728,350.20 × 186,277.20
  4. Step 4: Simplify right side
    485,912.40x = 135,675,035,875.44
  5. Step 5: Solve for x
    x = 135,675,035,875.44/485,912.40
  6. Step 6: Final answer
    x = 279,217.07

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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.