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Finding the Fourth Proportional to 528.93, 793.62 and 408.20

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Solution

The fourth proportional to 528.93, 793.62 and 408.20 is: 612.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.93 : 793.62 = 408.20 : x
  2. Step 2: Convert to fraction form
    528.93/793.62 = 408.20/x
  3. Step 3: Cross multiply
    528.93x = 793.62 × 408.20
  4. Step 4: Simplify right side
    528.93x = 323,951.72
  5. Step 5: Solve for x
    x = 323,951.72/528.93
  6. Step 6: Final answer
    x = 612.47

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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.