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Finding the Fourth Proportional to 643,491.12, 965,237.85 and 264,147.47

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Solution

The fourth proportional to 643,491.12, 965,237.85 and 264,147.47 is: 396,221.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,491.12 : 965,237.85 = 264,147.47 : x
  2. Step 2: Convert to fraction form
    643,491.12/965,237.85 = 264,147.47/x
  3. Step 3: Cross multiply
    643,491.12x = 965,237.85 × 264,147.47
  4. Step 4: Simplify right side
    643,491.12x = 254,965,131,199.55
  5. Step 5: Solve for x
    x = 254,965,131,199.55/643,491.12
  6. Step 6: Final answer
    x = 396,221.68

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Similar ratio
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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.