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Finding the Fourth Proportional to 790.62, 1,185.56 and 270.48

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Solution

The fourth proportional to 790.62, 1,185.56 and 270.48 is: 405.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.62 : 1,185.56 = 270.48 : x
  2. Step 2: Convert to fraction form
    790.62/1,185.56 = 270.48/x
  3. Step 3: Cross multiply
    790.62x = 1,185.56 × 270.48
  4. Step 4: Simplify right side
    790.62x = 320,670.27
  5. Step 5: Solve for x
    x = 320,670.27/790.62
  6. Step 6: Final answer
    x = 405.59

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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.