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Finding the Fourth Proportional to 558.67, 770.11 and 440.43

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Solution

The fourth proportional to 558.67, 770.11 and 440.43 is: 607.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.67 : 770.11 = 440.43 : x
  2. Step 2: Convert to fraction form
    558.67/770.11 = 440.43/x
  3. Step 3: Cross multiply
    558.67x = 770.11 × 440.43
  4. Step 4: Simplify right side
    558.67x = 339,179.55
  5. Step 5: Solve for x
    x = 339,179.55/558.67
  6. Step 6: Final answer
    x = 607.12

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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.