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Finding the Fourth Proportional to 427.89, 589.68 and 392.97

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Solution

The fourth proportional to 427.89, 589.68 and 392.97 is: 541.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.89 : 589.68 = 392.97 : x
  2. Step 2: Convert to fraction form
    427.89/589.68 = 392.97/x
  3. Step 3: Cross multiply
    427.89x = 589.68 × 392.97
  4. Step 4: Simplify right side
    427.89x = 231,726.55
  5. Step 5: Solve for x
    x = 231,726.55/427.89
  6. Step 6: Final answer
    x = 541.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.