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Finding the Fourth Proportional to 655.53, 982.74 and 381.81

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Solution

The fourth proportional to 655.53, 982.74 and 381.81 is: 572.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.53 : 982.74 = 381.81 : x
  2. Step 2: Convert to fraction form
    655.53/982.74 = 381.81/x
  3. Step 3: Cross multiply
    655.53x = 982.74 × 381.81
  4. Step 4: Simplify right side
    655.53x = 375,219.96
  5. Step 5: Solve for x
    x = 375,219.96/655.53
  6. Step 6: Final answer
    x = 572.39

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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.