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Finding the Fourth Proportional to 399.14, 597.66 and 276.86

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Solution

The fourth proportional to 399.14, 597.66 and 276.86 is: 414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.14 : 597.66 = 276.86 : x
  2. Step 2: Convert to fraction form
    399.14/597.66 = 276.86/x
  3. Step 3: Cross multiply
    399.14x = 597.66 × 276.86
  4. Step 4: Simplify right side
    399.14x = 165,468.15
  5. Step 5: Solve for x
    x = 165,468.15/399.14
  6. Step 6: Final answer
    x = 414.56

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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.