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Finding the Fourth Proportional to 279,215.82, 385,317.54 and 151,891.11

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Solution

The fourth proportional to 279,215.82, 385,317.54 and 151,891.11 is: 209,609.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,215.82 : 385,317.54 = 151,891.11 : x
  2. Step 2: Convert to fraction form
    279,215.82/385,317.54 = 151,891.11/x
  3. Step 3: Cross multiply
    279,215.82x = 385,317.54 × 151,891.11
  4. Step 4: Simplify right side
    279,215.82x = 58,526,308,853.07
  5. Step 5: Solve for x
    x = 58,526,308,853.07/279,215.82
  6. Step 6: Final answer
    x = 209,609.57

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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.