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Finding the Fourth Proportional to 792.90, 1,182.42 and 711

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Solution

The fourth proportional to 792.90, 1,182.42 and 711 is: 1,060.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.90 : 1,182.42 = 711 : x
  2. Step 2: Convert to fraction form
    792.90/1,182.42 = 711/x
  3. Step 3: Cross multiply
    792.90x = 1,182.42 × 711
  4. Step 4: Simplify right side
    792.90x = 840,700.62
  5. Step 5: Solve for x
    x = 840,700.62/792.90
  6. Step 6: Final answer
    x = 1,060.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.