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Finding the Fourth Proportional to 650.40, 975.62 and 211.65

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Solution

The fourth proportional to 650.40, 975.62 and 211.65 is: 317.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.40 : 975.62 = 211.65 : x
  2. Step 2: Convert to fraction form
    650.40/975.62 = 211.65/x
  3. Step 3: Cross multiply
    650.40x = 975.62 × 211.65
  4. Step 4: Simplify right side
    650.40x = 206,488.91
  5. Step 5: Solve for x
    x = 206,488.91/650.40
  6. Step 6: Final answer
    x = 317.48

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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.