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Finding the Fourth Proportional to 504.45, 755.73 and 261.11

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Solution

The fourth proportional to 504.45, 755.73 and 261.11 is: 391.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.45 : 755.73 = 261.11 : x
  2. Step 2: Convert to fraction form
    504.45/755.73 = 261.11/x
  3. Step 3: Cross multiply
    504.45x = 755.73 × 261.11
  4. Step 4: Simplify right side
    504.45x = 197,330.55
  5. Step 5: Solve for x
    x = 197,330.55/504.45
  6. Step 6: Final answer
    x = 391.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.