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Finding the Fourth Proportional to 455.20, 683.40 and 300.89

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Solution

The fourth proportional to 455.20, 683.40 and 300.89 is: 451.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.20 : 683.40 = 300.89 : x
  2. Step 2: Convert to fraction form
    455.20/683.40 = 300.89/x
  3. Step 3: Cross multiply
    455.20x = 683.40 × 300.89
  4. Step 4: Simplify right side
    455.20x = 205,628.23
  5. Step 5: Solve for x
    x = 205,628.23/455.20
  6. Step 6: Final answer
    x = 451.73

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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.