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Finding the Fourth Proportional to 610.45, 842.34 and 361.78

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Solution

The fourth proportional to 610.45, 842.34 and 361.78 is: 499.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.45 : 842.34 = 361.78 : x
  2. Step 2: Convert to fraction form
    610.45/842.34 = 361.78/x
  3. Step 3: Cross multiply
    610.45x = 842.34 × 361.78
  4. Step 4: Simplify right side
    610.45x = 304,741.77
  5. Step 5: Solve for x
    x = 304,741.77/610.45
  6. Step 6: Final answer
    x = 499.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.