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Finding the Fourth Proportional to 643,913.84, 965,870.76 and 223,189.71

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Solution

The fourth proportional to 643,913.84, 965,870.76 and 223,189.71 is: 334,784.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,913.84 : 965,870.76 = 223,189.71 : x
  2. Step 2: Convert to fraction form
    643,913.84/965,870.76 = 223,189.71/x
  3. Step 3: Cross multiply
    643,913.84x = 965,870.76 × 223,189.71
  4. Step 4: Simplify right side
    643,913.84x = 215,572,414,821.88
  5. Step 5: Solve for x
    x = 215,572,414,821.88/643,913.84
  6. Step 6: Final answer
    x = 334,784.57

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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.