Home / 643,628.20-965,442.30-269,612.20

Finding the Fourth Proportional to 643,628.20, 965,442.30 and 269,612.20

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Solution

The fourth proportional to 643,628.20, 965,442.30 and 269,612.20 is: 404,418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,628.20 : 965,442.30 = 269,612.20 : x
  2. Step 2: Convert to fraction form
    643,628.20/965,442.30 = 269,612.20/x
  3. Step 3: Cross multiply
    643,628.20x = 965,442.30 × 269,612.20
  4. Step 4: Simplify right side
    643,628.20x = 260,295,022,476.06
  5. Step 5: Solve for x
    x = 260,295,022,476.06/643,628.20
  6. Step 6: Final answer
    x = 404,418.30

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Double scale
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Similar ratio
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1.5x scale

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.