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Finding the Fourth Proportional to 681,660.82, 940,346.20 and 520,235.60

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Solution

The fourth proportional to 681,660.82, 940,346.20 and 520,235.60 is: 717,661.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,660.82 : 940,346.20 = 520,235.60 : x
  2. Step 2: Convert to fraction form
    681,660.82/940,346.20 = 520,235.60/x
  3. Step 3: Cross multiply
    681,660.82x = 940,346.20 × 520,235.60
  4. Step 4: Simplify right side
    681,660.82x = 489,201,569,564.72
  5. Step 5: Solve for x
    x = 489,201,569,564.72/681,660.82
  6. Step 6: Final answer
    x = 717,661.27

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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.