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Finding the Fourth Proportional to 294.20, 441.23 and 139.82

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Solution

The fourth proportional to 294.20, 441.23 and 139.82 is: 209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.20 : 441.23 = 139.82 : x
  2. Step 2: Convert to fraction form
    294.20/441.23 = 139.82/x
  3. Step 3: Cross multiply
    294.20x = 441.23 × 139.82
  4. Step 4: Simplify right side
    294.20x = 61,692.81
  5. Step 5: Solve for x
    x = 61,692.81/294.20
  6. Step 6: Final answer
    x = 209.70

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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.