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Finding the Fourth Proportional to 793.47, 1,190.20 and 521.28

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Solution

The fourth proportional to 793.47, 1,190.20 and 521.28 is: 781.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.47 : 1,190.20 = 521.28 : x
  2. Step 2: Convert to fraction form
    793.47/1,190.20 = 521.28/x
  3. Step 3: Cross multiply
    793.47x = 1,190.20 × 521.28
  4. Step 4: Simplify right side
    793.47x = 620,427.46
  5. Step 5: Solve for x
    x = 620,427.46/793.47
  6. Step 6: Final answer
    x = 781.92

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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.