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Finding the Fourth Proportional to 206.19, 284.58 and 140.67

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Solution

The fourth proportional to 206.19, 284.58 and 140.67 is: 194.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.19 : 284.58 = 140.67 : x
  2. Step 2: Convert to fraction form
    206.19/284.58 = 140.67/x
  3. Step 3: Cross multiply
    206.19x = 284.58 × 140.67
  4. Step 4: Simplify right side
    206.19x = 40,031.87
  5. Step 5: Solve for x
    x = 40,031.87/206.19
  6. Step 6: Final answer
    x = 194.15

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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.