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Finding the Fourth Proportional to 215.80, 297.81 and 146.00

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Solution

The fourth proportional to 215.80, 297.81 and 146.00 is: 201.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.80 : 297.81 = 146.00 : x
  2. Step 2: Convert to fraction form
    215.80/297.81 = 146.00/x
  3. Step 3: Cross multiply
    215.80x = 297.81 × 146.00
  4. Step 4: Simplify right side
    215.80x = 43,481.00
  5. Step 5: Solve for x
    x = 43,481.00/215.80
  6. Step 6: Final answer
    x = 201.49

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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.