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Finding the Fourth Proportional to 605,092.80, 907,930.80 and 427,216.80

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Solution

The fourth proportional to 605,092.80, 907,930.80 and 427,216.80 is: 641,031.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,092.80 : 907,930.80 = 427,216.80 : x
  2. Step 2: Convert to fraction form
    605,092.80/907,930.80 = 427,216.80/x
  3. Step 3: Cross multiply
    605,092.80x = 907,930.80 × 427,216.80
  4. Step 4: Simplify right side
    605,092.80x = 387,883,290,997.44
  5. Step 5: Solve for x
    x = 387,883,290,997.44/605,092.80
  6. Step 6: Final answer
    x = 641,031.08

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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.