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Finding the Fourth Proportional to 261.93, 360.64 and 222.51

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Solution

The fourth proportional to 261.93, 360.64 and 222.51 is: 306.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.93 : 360.64 = 222.51 : x
  2. Step 2: Convert to fraction form
    261.93/360.64 = 222.51/x
  3. Step 3: Cross multiply
    261.93x = 360.64 × 222.51
  4. Step 4: Simplify right side
    261.93x = 80,246.01
  5. Step 5: Solve for x
    x = 80,246.01/261.93
  6. Step 6: Final answer
    x = 306.36

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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.