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Finding the Fourth Proportional to 677,339.88, 934,759.38 and 386,976.84

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Solution

The fourth proportional to 677,339.88, 934,759.38 and 386,976.84 is: 534,045.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,339.88 : 934,759.38 = 386,976.84 : x
  2. Step 2: Convert to fraction form
    677,339.88/934,759.38 = 386,976.84/x
  3. Step 3: Cross multiply
    677,339.88x = 934,759.38 × 386,976.84
  4. Step 4: Simplify right side
    677,339.88x = 361,730,231,032.76
  5. Step 5: Solve for x
    x = 361,730,231,032.76/677,339.88
  6. Step 6: Final answer
    x = 534,045.38

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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.