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Finding the Fourth Proportional to 251.13, 346.31 and 152.79

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Solution

The fourth proportional to 251.13, 346.31 and 152.79 is: 210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.13 : 346.31 = 152.79 : x
  2. Step 2: Convert to fraction form
    251.13/346.31 = 152.79/x
  3. Step 3: Cross multiply
    251.13x = 346.31 × 152.79
  4. Step 4: Simplify right side
    251.13x = 52,911.94
  5. Step 5: Solve for x
    x = 52,911.94/251.13
  6. Step 6: Final answer
    x = 210.70

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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.