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Finding the Fourth Proportional to 681,565.61, 940,597.54 and 391,174.86

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Solution

The fourth proportional to 681,565.61, 940,597.54 and 391,174.86 is: 539,842.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,565.61 : 940,597.54 = 391,174.86 : x
  2. Step 2: Convert to fraction form
    681,565.61/940,597.54 = 391,174.86/x
  3. Step 3: Cross multiply
    681,565.61x = 940,597.54 × 391,174.86
  4. Step 4: Simplify right side
    681,565.61x = 367,938,111,025.84
  5. Step 5: Solve for x
    x = 367,938,111,025.84/681,565.61
  6. Step 6: Final answer
    x = 539,842.54

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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.