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Finding the Fourth Proportional to 215.33, 297.15 and 117.08

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Solution

The fourth proportional to 215.33, 297.15 and 117.08 is: 161.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.33 : 297.15 = 117.08 : x
  2. Step 2: Convert to fraction form
    215.33/297.15 = 117.08/x
  3. Step 3: Cross multiply
    215.33x = 297.15 × 117.08
  4. Step 4: Simplify right side
    215.33x = 34,790.32
  5. Step 5: Solve for x
    x = 34,790.32/215.33
  6. Step 6: Final answer
    x = 161.57

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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.