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Finding the Fourth Proportional to 213.59, 294.65 and 139.93

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Solution

The fourth proportional to 213.59, 294.65 and 139.93 is: 193.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.59 : 294.65 = 139.93 : x
  2. Step 2: Convert to fraction form
    213.59/294.65 = 139.93/x
  3. Step 3: Cross multiply
    213.59x = 294.65 × 139.93
  4. Step 4: Simplify right side
    213.59x = 41,230.25
  5. Step 5: Solve for x
    x = 41,230.25/213.59
  6. Step 6: Final answer
    x = 193.04

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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.