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Finding the Fourth Proportional to 215.58, 297.36 and 187.92

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Solution

The fourth proportional to 215.58, 297.36 and 187.92 is: 259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.58 : 297.36 = 187.92 : x
  2. Step 2: Convert to fraction form
    215.58/297.36 = 187.92/x
  3. Step 3: Cross multiply
    215.58x = 297.36 × 187.92
  4. Step 4: Simplify right side
    215.58x = 55,879.89
  5. Step 5: Solve for x
    x = 55,879.89/215.58
  6. Step 6: Final answer
    x = 259.21

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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.