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Finding the Fourth Proportional to 455.43, 683.19 and 260.76

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Solution

The fourth proportional to 455.43, 683.19 and 260.76 is: 391.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.43 : 683.19 = 260.76 : x
  2. Step 2: Convert to fraction form
    455.43/683.19 = 260.76/x
  3. Step 3: Cross multiply
    455.43x = 683.19 × 260.76
  4. Step 4: Simplify right side
    455.43x = 178,148.62
  5. Step 5: Solve for x
    x = 178,148.62/455.43
  6. Step 6: Final answer
    x = 391.17

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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.