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Finding the Fourth Proportional to 261.37, 360.70 and 143.35

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Solution

The fourth proportional to 261.37, 360.70 and 143.35 is: 197.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.37 : 360.70 = 143.35 : x
  2. Step 2: Convert to fraction form
    261.37/360.70 = 143.35/x
  3. Step 3: Cross multiply
    261.37x = 360.70 × 143.35
  4. Step 4: Simplify right side
    261.37x = 51,706.35
  5. Step 5: Solve for x
    x = 51,706.35/261.37
  6. Step 6: Final answer
    x = 197.83

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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.