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Finding the Fourth Proportional to 215.02, 296.77 and 127.72

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Solution

The fourth proportional to 215.02, 296.77 and 127.72 is: 176.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.02 : 296.77 = 127.72 : x
  2. Step 2: Convert to fraction form
    215.02/296.77 = 127.72/x
  3. Step 3: Cross multiply
    215.02x = 296.77 × 127.72
  4. Step 4: Simplify right side
    215.02x = 37,903.46
  5. Step 5: Solve for x
    x = 37,903.46/215.02
  6. Step 6: Final answer
    x = 176.28

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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.