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Finding the Fourth Proportional to 677,972.54, 935,455.92 and 391,326.54

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Solution

The fourth proportional to 677,972.54, 935,455.92 and 391,326.54 is: 539,946.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,972.54 : 935,455.92 = 391,326.54 : x
  2. Step 2: Convert to fraction form
    677,972.54/935,455.92 = 391,326.54/x
  3. Step 3: Cross multiply
    677,972.54x = 935,455.92 × 391,326.54
  4. Step 4: Simplify right side
    677,972.54x = 366,068,728,496.12
  5. Step 5: Solve for x
    x = 366,068,728,496.12/677,972.54
  6. Step 6: Final answer
    x = 539,946.25

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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.