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Finding the Fourth Proportional to 215.53, 297.35 and 131.53

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Solution

The fourth proportional to 215.53, 297.35 and 131.53 is: 181.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.53 : 297.35 = 131.53 : x
  2. Step 2: Convert to fraction form
    215.53/297.35 = 131.53/x
  3. Step 3: Cross multiply
    215.53x = 297.35 × 131.53
  4. Step 4: Simplify right side
    215.53x = 39,110.45
  5. Step 5: Solve for x
    x = 39,110.45/215.53
  6. Step 6: Final answer
    x = 181.47

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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.