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Finding the Fourth Proportional to 485,813.50, 728,813.66 and 186,270.72

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Solution

The fourth proportional to 485,813.50, 728,813.66 and 186,270.72 is: 279,441.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,813.50 : 728,813.66 = 186,270.72 : x
  2. Step 2: Convert to fraction form
    485,813.50/728,813.66 = 186,270.72/x
  3. Step 3: Cross multiply
    485,813.50x = 728,813.66 × 186,270.72
  4. Step 4: Simplify right side
    485,813.50x = 135,756,645,194.04
  5. Step 5: Solve for x
    x = 135,756,645,194.04/485,813.50
  6. Step 6: Final answer
    x = 279,441.90

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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.