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Finding the Fourth Proportional to 455.49, 683.24 and 387.32

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Solution

The fourth proportional to 455.49, 683.24 and 387.32 is: 580.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.49 : 683.24 = 387.32 : x
  2. Step 2: Convert to fraction form
    455.49/683.24 = 387.32/x
  3. Step 3: Cross multiply
    455.49x = 683.24 × 387.32
  4. Step 4: Simplify right side
    455.49x = 264,627.16
  5. Step 5: Solve for x
    x = 264,627.16/455.49
  6. Step 6: Final answer
    x = 580.97

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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.