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Finding the Fourth Proportional to 485,962.78, 728,894.95 and 131,012.68

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Solution

The fourth proportional to 485,962.78, 728,894.95 and 131,012.68 is: 196,505.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,962.78 : 728,894.95 = 131,012.68 : x
  2. Step 2: Convert to fraction form
    485,962.78/728,894.95 = 131,012.68/x
  3. Step 3: Cross multiply
    485,962.78x = 728,894.95 × 131,012.68
  4. Step 4: Simplify right side
    485,962.78x = 95,494,479,179.49
  5. Step 5: Solve for x
    x = 95,494,479,179.49/485,962.78
  6. Step 6: Final answer
    x = 196,505.75

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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.