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Finding the Fourth Proportional to 558.03, 770.36 and 361.70

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Solution

The fourth proportional to 558.03, 770.36 and 361.70 is: 499.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.03 : 770.36 = 361.70 : x
  2. Step 2: Convert to fraction form
    558.03/770.36 = 361.70/x
  3. Step 3: Cross multiply
    558.03x = 770.36 × 361.70
  4. Step 4: Simplify right side
    558.03x = 278,639.21
  5. Step 5: Solve for x
    x = 278,639.21/558.03
  6. Step 6: Final answer
    x = 499.33

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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.