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Finding the Fourth Proportional to 559.89, 839.90 and 235.21

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Solution

The fourth proportional to 559.89, 839.90 and 235.21 is: 352.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.89 : 839.90 = 235.21 : x
  2. Step 2: Convert to fraction form
    559.89/839.90 = 235.21/x
  3. Step 3: Cross multiply
    559.89x = 839.90 × 235.21
  4. Step 4: Simplify right side
    559.89x = 197,552.88
  5. Step 5: Solve for x
    x = 197,552.88/559.89
  6. Step 6: Final answer
    x = 352.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.