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Finding the Fourth Proportional to 261.45, 360.81 and 145.02

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Solution

The fourth proportional to 261.45, 360.81 and 145.02 is: 200.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.45 : 360.81 = 145.02 : x
  2. Step 2: Convert to fraction form
    261.45/360.81 = 145.02/x
  3. Step 3: Cross multiply
    261.45x = 360.81 × 145.02
  4. Step 4: Simplify right side
    261.45x = 52,324.67
  5. Step 5: Solve for x
    x = 52,324.67/261.45
  6. Step 6: Final answer
    x = 200.13

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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.