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Finding the Fourth Proportional to 643,489.62, 965,235.60 and 264,145.97

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Solution

The fourth proportional to 643,489.62, 965,235.60 and 264,145.97 is: 396,219.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,489.62 : 965,235.60 = 264,145.97 : x
  2. Step 2: Convert to fraction form
    643,489.62/965,235.60 = 264,145.97/x
  3. Step 3: Cross multiply
    643,489.62x = 965,235.60 × 264,145.97
  4. Step 4: Simplify right side
    643,489.62x = 254,963,089,014.35
  5. Step 5: Solve for x
    x = 254,963,089,014.35/643,489.62
  6. Step 6: Final answer
    x = 396,219.43

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Double scale
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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.