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Finding the Fourth Proportional to 397.67, 596.21 and 260.75

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Solution

The fourth proportional to 397.67, 596.21 and 260.75 is: 390.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.67 : 596.21 = 260.75 : x
  2. Step 2: Convert to fraction form
    397.67/596.21 = 260.75/x
  3. Step 3: Cross multiply
    397.67x = 596.21 × 260.75
  4. Step 4: Simplify right side
    397.67x = 155,460.45
  5. Step 5: Solve for x
    x = 155,460.45/397.67
  6. Step 6: Final answer
    x = 390.93

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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.