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Finding the Fourth Proportional to 681,646.78, 940,561.50 and 395,110.90

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Solution

The fourth proportional to 681,646.78, 940,561.50 and 395,110.90 is: 545,188.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,646.78 : 940,561.50 = 395,110.90 : x
  2. Step 2: Convert to fraction form
    681,646.78/940,561.50 = 395,110.90/x
  3. Step 3: Cross multiply
    681,646.78x = 940,561.50 × 395,110.90
  4. Step 4: Simplify right side
    681,646.78x = 371,626,100,770.35
  5. Step 5: Solve for x
    x = 371,626,100,770.35/681,646.78
  6. Step 6: Final answer
    x = 545,188.67

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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.