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Finding the Fourth Proportional to 455.69, 682.72 and 404.87

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Solution

The fourth proportional to 455.69, 682.72 and 404.87 is: 606.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.69 : 682.72 = 404.87 : x
  2. Step 2: Convert to fraction form
    455.69/682.72 = 404.87/x
  3. Step 3: Cross multiply
    455.69x = 682.72 × 404.87
  4. Step 4: Simplify right side
    455.69x = 276,408.42
  5. Step 5: Solve for x
    x = 276,408.42/455.69
  6. Step 6: Final answer
    x = 606.57

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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.