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Finding the Fourth Proportional to 251.42, 347.04 and 153.15

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Solution

The fourth proportional to 251.42, 347.04 and 153.15 is: 211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.42 : 347.04 = 153.15 : x
  2. Step 2: Convert to fraction form
    251.42/347.04 = 153.15/x
  3. Step 3: Cross multiply
    251.42x = 347.04 × 153.15
  4. Step 4: Simplify right side
    251.42x = 53,149.18
  5. Step 5: Solve for x
    x = 53,149.18/251.42
  6. Step 6: Final answer
    x = 211.40

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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.