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Finding the Fourth Proportional to 521,129.89, 719,098.72 and 291,699.96

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Solution

The fourth proportional to 521,129.89, 719,098.72 and 291,699.96 is: 402,512.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,129.89 : 719,098.72 = 291,699.96 : x
  2. Step 2: Convert to fraction form
    521,129.89/719,098.72 = 291,699.96/x
  3. Step 3: Cross multiply
    521,129.89x = 719,098.72 × 291,699.96
  4. Step 4: Simplify right side
    521,129.89x = 209,761,067,860.05
  5. Step 5: Solve for x
    x = 209,761,067,860.05/521,129.89
  6. Step 6: Final answer
    x = 402,512.06

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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.