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Finding the Fourth Proportional to 561.15, 842.01 and 397.68

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Solution

The fourth proportional to 561.15, 842.01 and 397.68 is: 596.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.15 : 842.01 = 397.68 : x
  2. Step 2: Convert to fraction form
    561.15/842.01 = 397.68/x
  3. Step 3: Cross multiply
    561.15x = 842.01 × 397.68
  4. Step 4: Simplify right side
    561.15x = 334,850.54
  5. Step 5: Solve for x
    x = 334,850.54/561.15
  6. Step 6: Final answer
    x = 596.72

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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.