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Finding the Fourth Proportional to 215.03, 296.69 and 127.71

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Solution

The fourth proportional to 215.03, 296.69 and 127.71 is: 176.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.03 : 296.69 = 127.71 : x
  2. Step 2: Convert to fraction form
    215.03/296.69 = 127.71/x
  3. Step 3: Cross multiply
    215.03x = 296.69 × 127.71
  4. Step 4: Simplify right side
    215.03x = 37,889.64
  5. Step 5: Solve for x
    x = 37,889.64/215.03
  6. Step 6: Final answer
    x = 176.21

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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.