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Finding the Fourth Proportional to 455.57, 683.51 and 249.87

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Solution

The fourth proportional to 455.57, 683.51 and 249.87 is: 374.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.57 : 683.51 = 249.87 : x
  2. Step 2: Convert to fraction form
    455.57/683.51 = 249.87/x
  3. Step 3: Cross multiply
    455.57x = 683.51 × 249.87
  4. Step 4: Simplify right side
    455.57x = 170,787.39
  5. Step 5: Solve for x
    x = 170,787.39/455.57
  6. Step 6: Final answer
    x = 374.89

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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.