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Finding the Fourth Proportional to 251.30, 346.77 and 172.70

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Solution

The fourth proportional to 251.30, 346.77 and 172.70 is: 238.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.30 : 346.77 = 172.70 : x
  2. Step 2: Convert to fraction form
    251.30/346.77 = 172.70/x
  3. Step 3: Cross multiply
    251.30x = 346.77 × 172.70
  4. Step 4: Simplify right side
    251.30x = 59,887.18
  5. Step 5: Solve for x
    x = 59,887.18/251.30
  6. Step 6: Final answer
    x = 238.31

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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.