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Finding the Fourth Proportional to 571,212.50, 788,241.17 and 313,040.21

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Solution

The fourth proportional to 571,212.50, 788,241.17 and 313,040.21 is: 431,977.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,212.50 : 788,241.17 = 313,040.21 : x
  2. Step 2: Convert to fraction form
    571,212.50/788,241.17 = 313,040.21/x
  3. Step 3: Cross multiply
    571,212.50x = 788,241.17 × 313,040.21
  4. Step 4: Simplify right side
    571,212.50x = 246,751,175,881.04
  5. Step 5: Solve for x
    x = 246,751,175,881.04/571,212.50
  6. Step 6: Final answer
    x = 431,977.90

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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.