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Finding the Fourth Proportional to 558, 770.05 and 321.95

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Solution

The fourth proportional to 558, 770.05 and 321.95 is: 444.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    558 : 770.05 = 321.95 : x
  2. Step 2: Convert to fraction form
    558/770.05 = 321.95/x
  3. Step 3: Cross multiply
    558x = 770.05 × 321.95
  4. Step 4: Simplify right side
    558x = 247,919.93
  5. Step 5: Solve for x
    x = 247,919.93/558
  6. Step 6: Final answer
    x = 444.30

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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.