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Finding the Fourth Proportional to 655.86, 984.33 and 331.32

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Solution

The fourth proportional to 655.86, 984.33 and 331.32 is: 497.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.86 : 984.33 = 331.32 : x
  2. Step 2: Convert to fraction form
    655.86/984.33 = 331.32/x
  3. Step 3: Cross multiply
    655.86x = 984.33 × 331.32
  4. Step 4: Simplify right side
    655.86x = 326,128.22
  5. Step 5: Solve for x
    x = 326,128.22/655.86
  6. Step 6: Final answer
    x = 497.25

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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.