Home / 643,724.96-965,204.24-217,155.84

Finding the Fourth Proportional to 643,724.96, 965,204.24 and 217,155.84

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Solution

The fourth proportional to 643,724.96, 965,204.24 and 217,155.84 is: 325,604.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,724.96 : 965,204.24 = 217,155.84 : x
  2. Step 2: Convert to fraction form
    643,724.96/965,204.24 = 217,155.84/x
  3. Step 3: Cross multiply
    643,724.96x = 965,204.24 × 217,155.84
  4. Step 4: Simplify right side
    643,724.96x = 209,599,732,803.47
  5. Step 5: Solve for x
    x = 209,599,732,803.47/643,724.96
  6. Step 6: Final answer
    x = 325,604.49

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Half scale
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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.