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Finding the Fourth Proportional to 215.06, 296.80 and 127.72

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Solution

The fourth proportional to 215.06, 296.80 and 127.72 is: 176.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.06 : 296.80 = 127.72 : x
  2. Step 2: Convert to fraction form
    215.06/296.80 = 127.72/x
  3. Step 3: Cross multiply
    215.06x = 296.80 × 127.72
  4. Step 4: Simplify right side
    215.06x = 37,907.30
  5. Step 5: Solve for x
    x = 37,907.30/215.06
  6. Step 6: Final answer
    x = 176.26

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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.