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Finding the Fourth Proportional to 426.75, 637.23 and 393.95

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Solution

The fourth proportional to 426.75, 637.23 and 393.95 is: 588.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.75 : 637.23 = 393.95 : x
  2. Step 2: Convert to fraction form
    426.75/637.23 = 393.95/x
  3. Step 3: Cross multiply
    426.75x = 637.23 × 393.95
  4. Step 4: Simplify right side
    426.75x = 251,033.57
  5. Step 5: Solve for x
    x = 251,033.57/426.75
  6. Step 6: Final answer
    x = 588.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.