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Finding the Fourth Proportional to 558.32, 770.78 and 361.95

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Solution

The fourth proportional to 558.32, 770.78 and 361.95 is: 499.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.32 : 770.78 = 361.95 : x
  2. Step 2: Convert to fraction form
    558.32/770.78 = 361.95/x
  3. Step 3: Cross multiply
    558.32x = 770.78 × 361.95
  4. Step 4: Simplify right side
    558.32x = 278,983.82
  5. Step 5: Solve for x
    x = 278,983.82/558.32
  6. Step 6: Final answer
    x = 499.68

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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.