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Finding the Fourth Proportional to 468.96, 702.80 and 212

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Solution

The fourth proportional to 468.96, 702.80 and 212 is: 317.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.96 : 702.80 = 212 : x
  2. Step 2: Convert to fraction form
    468.96/702.80 = 212/x
  3. Step 3: Cross multiply
    468.96x = 702.80 × 212
  4. Step 4: Simplify right side
    468.96x = 148,993.60
  5. Step 5: Solve for x
    x = 148,993.60/468.96
  6. Step 6: Final answer
    x = 317.71

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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.