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Finding the Fourth Proportional to 522,905.70, 784,358.55 and 186,326.40

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Solution

The fourth proportional to 522,905.70, 784,358.55 and 186,326.40 is: 279,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,905.70 : 784,358.55 = 186,326.40 : x
  2. Step 2: Convert to fraction form
    522,905.70/784,358.55 = 186,326.40/x
  3. Step 3: Cross multiply
    522,905.70x = 784,358.55 × 186,326.40
  4. Step 4: Simplify right side
    522,905.70x = 146,146,704,930.72
  5. Step 5: Solve for x
    x = 146,146,704,930.72/522,905.70
  6. Step 6: Final answer
    x = 279,489.60

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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.