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Finding the Fourth Proportional to 792.90, 1,093.92 and 482.40

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Solution

The fourth proportional to 792.90, 1,093.92 and 482.40 is: 665.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.90 : 1,093.92 = 482.40 : x
  2. Step 2: Convert to fraction form
    792.90/1,093.92 = 482.40/x
  3. Step 3: Cross multiply
    792.90x = 1,093.92 × 482.40
  4. Step 4: Simplify right side
    792.90x = 527,707.01
  5. Step 5: Solve for x
    x = 527,707.01/792.90
  6. Step 6: Final answer
    x = 665.54

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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.