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Finding the Fourth Proportional to 681,398.16, 940,329.48 and 395,084.32

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Solution

The fourth proportional to 681,398.16, 940,329.48 and 395,084.32 is: 545,216.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,398.16 : 940,329.48 = 395,084.32 : x
  2. Step 2: Convert to fraction form
    681,398.16/940,329.48 = 395,084.32/x
  3. Step 3: Cross multiply
    681,398.16x = 940,329.48 × 395,084.32
  4. Step 4: Simplify right side
    681,398.16x = 371,509,435,838.73
  5. Step 5: Solve for x
    x = 371,509,435,838.73/681,398.16
  6. Step 6: Final answer
    x = 545,216.38

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.