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Finding the Fourth Proportional to 620.13, 930.17 and 209.25

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Solution

The fourth proportional to 620.13, 930.17 and 209.25 is: 313.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.13 : 930.17 = 209.25 : x
  2. Step 2: Convert to fraction form
    620.13/930.17 = 209.25/x
  3. Step 3: Cross multiply
    620.13x = 930.17 × 209.25
  4. Step 4: Simplify right side
    620.13x = 194,639.87
  5. Step 5: Solve for x
    x = 194,639.87/620.13
  6. Step 6: Final answer
    x = 313.87

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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.