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Finding the Fourth Proportional to 886,778.60, 1,330,362.30 and 287,637.80

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Solution

The fourth proportional to 886,778.60, 1,330,362.30 and 287,637.80 is: 431,519.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,778.60 : 1,330,362.30 = 287,637.80 : x
  2. Step 2: Convert to fraction form
    886,778.60/1,330,362.30 = 287,637.80/x
  3. Step 3: Cross multiply
    886,778.60x = 1,330,362.30 × 287,637.80
  4. Step 4: Simplify right side
    886,778.60x = 382,662,485,174.94
  5. Step 5: Solve for x
    x = 382,662,485,174.94/886,778.60
  6. Step 6: Final answer
    x = 431,519.76

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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.