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Finding the Fourth Proportional to 312.34, 467.70 and 214.60

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Solution

The fourth proportional to 312.34, 467.70 and 214.60 is: 321.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.34 : 467.70 = 214.60 : x
  2. Step 2: Convert to fraction form
    312.34/467.70 = 214.60/x
  3. Step 3: Cross multiply
    312.34x = 467.70 × 214.60
  4. Step 4: Simplify right side
    312.34x = 100,368.42
  5. Step 5: Solve for x
    x = 100,368.42/312.34
  6. Step 6: Final answer
    x = 321.34

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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.