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Finding the Fourth Proportional to 558.04, 770.08 and 321.90

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Solution

The fourth proportional to 558.04, 770.08 and 321.90 is: 444.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.04 : 770.08 = 321.90 : x
  2. Step 2: Convert to fraction form
    558.04/770.08 = 321.90/x
  3. Step 3: Cross multiply
    558.04x = 770.08 × 321.90
  4. Step 4: Simplify right side
    558.04x = 247,885.66
  5. Step 5: Solve for x
    x = 247,885.66/558.04
  6. Step 6: Final answer
    x = 444.21

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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.