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Finding the Fourth Proportional to 689,688.54, 951,770.88 and 383,792.76

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Solution

The fourth proportional to 689,688.54, 951,770.88 and 383,792.76 is: 529,634.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,688.54 : 951,770.88 = 383,792.76 : x
  2. Step 2: Convert to fraction form
    689,688.54/951,770.88 = 383,792.76/x
  3. Step 3: Cross multiply
    689,688.54x = 951,770.88 × 383,792.76
  4. Step 4: Simplify right side
    689,688.54x = 365,282,772,922.83
  5. Step 5: Solve for x
    x = 365,282,772,922.83/689,688.54
  6. Step 6: Final answer
    x = 529,634.40

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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.