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Finding the Fourth Proportional to 251.82, 347.72 and 153.63

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Solution

The fourth proportional to 251.82, 347.72 and 153.63 is: 212.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.82 : 347.72 = 153.63 : x
  2. Step 2: Convert to fraction form
    251.82/347.72 = 153.63/x
  3. Step 3: Cross multiply
    251.82x = 347.72 × 153.63
  4. Step 4: Simplify right side
    251.82x = 53,419.46
  5. Step 5: Solve for x
    x = 53,419.46/251.82
  6. Step 6: Final answer
    x = 212.13

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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.