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Finding the Fourth Proportional to 206.69, 308.75 and 152.69

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Solution

The fourth proportional to 206.69, 308.75 and 152.69 is: 228.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.69 : 308.75 = 152.69 : x
  2. Step 2: Convert to fraction form
    206.69/308.75 = 152.69/x
  3. Step 3: Cross multiply
    206.69x = 308.75 × 152.69
  4. Step 4: Simplify right side
    206.69x = 47,140.73
  5. Step 5: Solve for x
    x = 47,140.73/206.69
  6. Step 6: Final answer
    x = 228.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.