Home / 643,938.20-965,907.30-223,256.60

Finding the Fourth Proportional to 643,938.20, 965,907.30 and 223,256.60

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Solution

The fourth proportional to 643,938.20, 965,907.30 and 223,256.60 is: 334,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,938.20 : 965,907.30 = 223,256.60 : x
  2. Step 2: Convert to fraction form
    643,938.20/965,907.30 = 223,256.60/x
  3. Step 3: Cross multiply
    643,938.20x = 965,907.30 × 223,256.60
  4. Step 4: Simplify right side
    643,938.20x = 215,645,179,713.18
  5. Step 5: Solve for x
    x = 215,645,179,713.18/643,938.20
  6. Step 6: Final answer
    x = 334,884.90

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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.