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Finding the Fourth Proportional to 1,385.39, 1,911.81 and 795.92

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Solution

The fourth proportional to 1,385.39, 1,911.81 and 795.92 is: 1,098.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.39 : 1,911.81 = 795.92 : x
  2. Step 2: Convert to fraction form
    1,385.39/1,911.81 = 795.92/x
  3. Step 3: Cross multiply
    1,385.39x = 1,911.81 × 795.92
  4. Step 4: Simplify right side
    1,385.39x = 1,521,638.26
  5. Step 5: Solve for x
    x = 1,521,638.26/1,385.39
  6. Step 6: Final answer
    x = 1,098.34

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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.