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Finding the Fourth Proportional to 215.83, 297.83 and 127.30

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Solution

The fourth proportional to 215.83, 297.83 and 127.30 is: 175.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.83 : 297.83 = 127.30 : x
  2. Step 2: Convert to fraction form
    215.83/297.83 = 127.30/x
  3. Step 3: Cross multiply
    215.83x = 297.83 × 127.30
  4. Step 4: Simplify right side
    215.83x = 37,912.38
  5. Step 5: Solve for x
    x = 37,912.38/215.83
  6. Step 6: Final answer
    x = 175.66

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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.