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Finding the Fourth Proportional to 206.40, 284.85 and 119.10

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Solution

The fourth proportional to 206.40, 284.85 and 119.10 is: 164.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.40 : 284.85 = 119.10 : x
  2. Step 2: Convert to fraction form
    206.40/284.85 = 119.10/x
  3. Step 3: Cross multiply
    206.40x = 284.85 × 119.10
  4. Step 4: Simplify right side
    206.40x = 33,925.64
  5. Step 5: Solve for x
    x = 33,925.64/206.40
  6. Step 6: Final answer
    x = 164.37

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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.