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Finding the Fourth Proportional to 261.20, 360.70 and 162.98

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Solution

The fourth proportional to 261.20, 360.70 and 162.98 is: 225.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.20 : 360.70 = 162.98 : x
  2. Step 2: Convert to fraction form
    261.20/360.70 = 162.98/x
  3. Step 3: Cross multiply
    261.20x = 360.70 × 162.98
  4. Step 4: Simplify right side
    261.20x = 58,786.89
  5. Step 5: Solve for x
    x = 58,786.89/261.20
  6. Step 6: Final answer
    x = 225.06

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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.