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Finding the Fourth Proportional to 194.24, 291.40 and 139.50

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Solution

The fourth proportional to 194.24, 291.40 and 139.50 is: 209.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.24 : 291.40 = 139.50 : x
  2. Step 2: Convert to fraction form
    194.24/291.40 = 139.50/x
  3. Step 3: Cross multiply
    194.24x = 291.40 × 139.50
  4. Step 4: Simplify right side
    194.24x = 40,650.30
  5. Step 5: Solve for x
    x = 40,650.30/194.24
  6. Step 6: Final answer
    x = 209.28

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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.