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Finding the Fourth Proportional to 683.08, 1,024.80 and 440.80

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Solution

The fourth proportional to 683.08, 1,024.80 and 440.80 is: 661.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.08 : 1,024.80 = 440.80 : x
  2. Step 2: Convert to fraction form
    683.08/1,024.80 = 440.80/x
  3. Step 3: Cross multiply
    683.08x = 1,024.80 × 440.80
  4. Step 4: Simplify right side
    683.08x = 451,731.84
  5. Step 5: Solve for x
    x = 451,731.84/683.08
  6. Step 6: Final answer
    x = 661.32

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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.