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Finding the Fourth Proportional to 397.90, 596.91 and 123.94

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Solution

The fourth proportional to 397.90, 596.91 and 123.94 is: 185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.90 : 596.91 = 123.94 : x
  2. Step 2: Convert to fraction form
    397.90/596.91 = 123.94/x
  3. Step 3: Cross multiply
    397.90x = 596.91 × 123.94
  4. Step 4: Simplify right side
    397.90x = 73,981.03
  5. Step 5: Solve for x
    x = 73,981.03/397.90
  6. Step 6: Final answer
    x = 185.93

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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.