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Finding the Fourth Proportional to 455.47, 683.28 and 260.69

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Solution

The fourth proportional to 455.47, 683.28 and 260.69 is: 391.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.47 : 683.28 = 260.69 : x
  2. Step 2: Convert to fraction form
    455.47/683.28 = 260.69/x
  3. Step 3: Cross multiply
    455.47x = 683.28 × 260.69
  4. Step 4: Simplify right side
    455.47x = 178,120.85
  5. Step 5: Solve for x
    x = 178,120.85/455.47
  6. Step 6: Final answer
    x = 391.07

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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.