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Finding the Fourth Proportional to 455.77, 684.33 and 404.74

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Solution

The fourth proportional to 455.77, 684.33 and 404.74 is: 607.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.77 : 684.33 = 404.74 : x
  2. Step 2: Convert to fraction form
    455.77/684.33 = 404.74/x
  3. Step 3: Cross multiply
    455.77x = 684.33 × 404.74
  4. Step 4: Simplify right side
    455.77x = 276,972.30
  5. Step 5: Solve for x
    x = 276,972.30/455.77
  6. Step 6: Final answer
    x = 607.71

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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.