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Finding the Fourth Proportional to 215.37, 322.75 and 123.93

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Solution

The fourth proportional to 215.37, 322.75 and 123.93 is: 185.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.37 : 322.75 = 123.93 : x
  2. Step 2: Convert to fraction form
    215.37/322.75 = 123.93/x
  3. Step 3: Cross multiply
    215.37x = 322.75 × 123.93
  4. Step 4: Simplify right side
    215.37x = 39,998.41
  5. Step 5: Solve for x
    x = 39,998.41/215.37
  6. Step 6: Final answer
    x = 185.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.