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Finding the Fourth Proportional to 5,221.84, 7,833.92 and 1,759

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Solution

The fourth proportional to 5,221.84, 7,833.92 and 1,759 is: 2,638.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.84 : 7,833.92 = 1,759 : x
  2. Step 2: Convert to fraction form
    5,221.84/7,833.92 = 1,759/x
  3. Step 3: Cross multiply
    5,221.84x = 7,833.92 × 1,759
  4. Step 4: Simplify right side
    5,221.84x = 13,779,865.28
  5. Step 5: Solve for x
    x = 13,779,865.28/5,221.84
  6. Step 6: Final answer
    x = 2,638.89

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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.