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Finding the Fourth Proportional to 681,090.11, 939,692.14 and 386,691.67

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Solution

The fourth proportional to 681,090.11, 939,692.14 and 386,691.67 is: 533,514.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,090.11 : 939,692.14 = 386,691.67 : x
  2. Step 2: Convert to fraction form
    681,090.11/939,692.14 = 386,691.67/x
  3. Step 3: Cross multiply
    681,090.11x = 939,692.14 × 386,691.67
  4. Step 4: Simplify right side
    681,090.11x = 363,371,116,270.56
  5. Step 5: Solve for x
    x = 363,371,116,270.56/681,090.11
  6. Step 6: Final answer
    x = 533,514.01

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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.