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Finding the Fourth Proportional to 622.06, 930.90 and 426.13

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Solution

The fourth proportional to 622.06, 930.90 and 426.13 is: 637.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.06 : 930.90 = 426.13 : x
  2. Step 2: Convert to fraction form
    622.06/930.90 = 426.13/x
  3. Step 3: Cross multiply
    622.06x = 930.90 × 426.13
  4. Step 4: Simplify right side
    622.06x = 396,684.42
  5. Step 5: Solve for x
    x = 396,684.42/622.06
  6. Step 6: Final answer
    x = 637.69

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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.