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Finding the Fourth Proportional to 212.31, 293.01 and 153.38

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Solution

The fourth proportional to 212.31, 293.01 and 153.38 is: 211.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.31 : 293.01 = 153.38 : x
  2. Step 2: Convert to fraction form
    212.31/293.01 = 153.38/x
  3. Step 3: Cross multiply
    212.31x = 293.01 × 153.38
  4. Step 4: Simplify right side
    212.31x = 44,941.87
  5. Step 5: Solve for x
    x = 44,941.87/212.31
  6. Step 6: Final answer
    x = 211.68

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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.