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Finding the Fourth Proportional to 665,402.81, 998,962.28 and 571,238.11

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Solution

The fourth proportional to 665,402.81, 998,962.28 and 571,238.11 is: 857,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,402.81 : 998,962.28 = 571,238.11 : x
  2. Step 2: Convert to fraction form
    665,402.81/998,962.28 = 571,238.11/x
  3. Step 3: Cross multiply
    665,402.81x = 998,962.28 × 571,238.11
  4. Step 4: Simplify right side
    665,402.81x = 570,645,324,788.49
  5. Step 5: Solve for x
    x = 570,645,324,788.49/665,402.81
  6. Step 6: Final answer
    x = 857,593.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.