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Finding the Fourth Proportional to 256,983.20, 385,499.10 and 69,994.70

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Solution

The fourth proportional to 256,983.20, 385,499.10 and 69,994.70 is: 104,998.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,983.20 : 385,499.10 = 69,994.70 : x
  2. Step 2: Convert to fraction form
    256,983.20/385,499.10 = 69,994.70/x
  3. Step 3: Cross multiply
    256,983.20x = 385,499.10 × 69,994.70
  4. Step 4: Simplify right side
    256,983.20x = 26,982,893,854.77
  5. Step 5: Solve for x
    x = 26,982,893,854.77/256,983.20
  6. Step 6: Final answer
    x = 104,998.67

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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.