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Finding the Fourth Proportional to 636,658.20, 954,987.30 and 257,760.45

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Solution

The fourth proportional to 636,658.20, 954,987.30 and 257,760.45 is: 386,640.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,658.20 : 954,987.30 = 257,760.45 : x
  2. Step 2: Convert to fraction form
    636,658.20/954,987.30 = 257,760.45/x
  3. Step 3: Cross multiply
    636,658.20x = 954,987.30 × 257,760.45
  4. Step 4: Simplify right side
    636,658.20x = 246,157,956,192.29
  5. Step 5: Solve for x
    x = 246,157,956,192.29/636,658.20
  6. Step 6: Final answer
    x = 386,640.68

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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.