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Finding the Fourth Proportional to 620.26, 930.52 and 209.45

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Solution

The fourth proportional to 620.26, 930.52 and 209.45 is: 314.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.26 : 930.52 = 209.45 : x
  2. Step 2: Convert to fraction form
    620.26/930.52 = 209.45/x
  3. Step 3: Cross multiply
    620.26x = 930.52 × 209.45
  4. Step 4: Simplify right side
    620.26x = 194,900.00
  5. Step 5: Solve for x
    x = 194,900.00/620.26
  6. Step 6: Final answer
    x = 314.22

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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.