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Finding the Fourth Proportional to 485,908.52, 729,073.20 and 261,006.44

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Solution

The fourth proportional to 485,908.52, 729,073.20 and 261,006.44 is: 391,622.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,908.52 : 729,073.20 = 261,006.44 : x
  2. Step 2: Convert to fraction form
    485,908.52/729,073.20 = 261,006.44/x
  3. Step 3: Cross multiply
    485,908.52x = 729,073.20 × 261,006.44
  4. Step 4: Simplify right side
    485,908.52x = 190,292,800,431.41
  5. Step 5: Solve for x
    x = 190,292,800,431.41/485,908.52
  6. Step 6: Final answer
    x = 391,622.69

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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.