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Finding the Fourth Proportional to 686,701.92, 947,650.70 and 380,799.84

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Solution

The fourth proportional to 686,701.92, 947,650.70 and 380,799.84 is: 525,504.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,701.92 : 947,650.70 = 380,799.84 : x
  2. Step 2: Convert to fraction form
    686,701.92/947,650.70 = 380,799.84/x
  3. Step 3: Cross multiply
    686,701.92x = 947,650.70 × 380,799.84
  4. Step 4: Simplify right side
    686,701.92x = 360,865,234,935.89
  5. Step 5: Solve for x
    x = 360,865,234,935.89/686,701.92
  6. Step 6: Final answer
    x = 525,504.92

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.