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Finding the Fourth Proportional to 388.75, 536.27 and 261.03

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Solution

The fourth proportional to 388.75, 536.27 and 261.03 is: 360.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.75 : 536.27 = 261.03 : x
  2. Step 2: Convert to fraction form
    388.75/536.27 = 261.03/x
  3. Step 3: Cross multiply
    388.75x = 536.27 × 261.03
  4. Step 4: Simplify right side
    388.75x = 139,978.57
  5. Step 5: Solve for x
    x = 139,978.57/388.75
  6. Step 6: Final answer
    x = 360.07

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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.