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Finding the Fourth Proportional to 677,466.33, 934,836.17 and 391,078.68

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Solution

The fourth proportional to 677,466.33, 934,836.17 and 391,078.68 is: 539,649.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,466.33 : 934,836.17 = 391,078.68 : x
  2. Step 2: Convert to fraction form
    677,466.33/934,836.17 = 391,078.68/x
  3. Step 3: Cross multiply
    677,466.33x = 934,836.17 × 391,078.68
  4. Step 4: Simplify right side
    677,466.33x = 365,594,493,424.46
  5. Step 5: Solve for x
    x = 365,594,493,424.46/677,466.33
  6. Step 6: Final answer
    x = 539,649.69

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Double scale
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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.