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Finding the Fourth Proportional to 790.26, 1,185.42 and 513.24

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Solution

The fourth proportional to 790.26, 1,185.42 and 513.24 is: 769.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.26 : 1,185.42 = 513.24 : x
  2. Step 2: Convert to fraction form
    790.26/1,185.42 = 513.24/x
  3. Step 3: Cross multiply
    790.26x = 1,185.42 × 513.24
  4. Step 4: Simplify right side
    790.26x = 608,404.96
  5. Step 5: Solve for x
    x = 608,404.96/790.26
  6. Step 6: Final answer
    x = 769.88

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Double scale
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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.