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Finding the Fourth Proportional to 215.59, 297.47 and 127.05

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Solution

The fourth proportional to 215.59, 297.47 and 127.05 is: 175.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.59 : 297.47 = 127.05 : x
  2. Step 2: Convert to fraction form
    215.59/297.47 = 127.05/x
  3. Step 3: Cross multiply
    215.59x = 297.47 × 127.05
  4. Step 4: Simplify right side
    215.59x = 37,793.56
  5. Step 5: Solve for x
    x = 37,793.56/215.59
  6. Step 6: Final answer
    x = 175.30

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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.