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Finding the Fourth Proportional to 650.45, 975.75 and 211.55

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Solution

The fourth proportional to 650.45, 975.75 and 211.55 is: 317.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.45 : 975.75 = 211.55 : x
  2. Step 2: Convert to fraction form
    650.45/975.75 = 211.55/x
  3. Step 3: Cross multiply
    650.45x = 975.75 × 211.55
  4. Step 4: Simplify right side
    650.45x = 206,415.03
  5. Step 5: Solve for x
    x = 206,415.03/650.45
  6. Step 6: Final answer
    x = 317.34

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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.