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Finding the Fourth Proportional to 261.56, 360.97 and 145.13

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Solution

The fourth proportional to 261.56, 360.97 and 145.13 is: 200.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.56 : 360.97 = 145.13 : x
  2. Step 2: Convert to fraction form
    261.56/360.97 = 145.13/x
  3. Step 3: Cross multiply
    261.56x = 360.97 × 145.13
  4. Step 4: Simplify right side
    261.56x = 52,385.41
  5. Step 5: Solve for x
    x = 52,385.41/261.56
  6. Step 6: Final answer
    x = 200.28

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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.