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Finding the Fourth Proportional to 643,952.20, 965,928.30 and 200,720.20

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Solution

The fourth proportional to 643,952.20, 965,928.30 and 200,720.20 is: 301,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,952.20 : 965,928.30 = 200,720.20 : x
  2. Step 2: Convert to fraction form
    643,952.20/965,928.30 = 200,720.20/x
  3. Step 3: Cross multiply
    643,952.20x = 965,928.30 × 200,720.20
  4. Step 4: Simplify right side
    643,952.20x = 193,881,321,561.66
  5. Step 5: Solve for x
    x = 193,881,321,561.66/643,952.20
  6. Step 6: Final answer
    x = 301,080.30

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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.