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Finding the Fourth Proportional to 455.48, 683.20 and 130.92

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Solution

The fourth proportional to 455.48, 683.20 and 130.92 is: 196.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.48 : 683.20 = 130.92 : x
  2. Step 2: Convert to fraction form
    455.48/683.20 = 130.92/x
  3. Step 3: Cross multiply
    455.48x = 683.20 × 130.92
  4. Step 4: Simplify right side
    455.48x = 89,444.54
  5. Step 5: Solve for x
    x = 89,444.54/455.48
  6. Step 6: Final answer
    x = 196.37

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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.