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Finding the Fourth Proportional to 215.49, 297.49 and 145.92

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Solution

The fourth proportional to 215.49, 297.49 and 145.92 is: 201.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.49 : 297.49 = 145.92 : x
  2. Step 2: Convert to fraction form
    215.49/297.49 = 145.92/x
  3. Step 3: Cross multiply
    215.49x = 297.49 × 145.92
  4. Step 4: Simplify right side
    215.49x = 43,409.92
  5. Step 5: Solve for x
    x = 43,409.92/215.49
  6. Step 6: Final answer
    x = 201.44

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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.