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Finding the Fourth Proportional to 683.80, 1,024.62 and 423.88

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Solution

The fourth proportional to 683.80, 1,024.62 and 423.88 is: 635.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.80 : 1,024.62 = 423.88 : x
  2. Step 2: Convert to fraction form
    683.80/1,024.62 = 423.88/x
  3. Step 3: Cross multiply
    683.80x = 1,024.62 × 423.88
  4. Step 4: Simplify right side
    683.80x = 434,315.93
  5. Step 5: Solve for x
    x = 434,315.93/683.80
  6. Step 6: Final answer
    x = 635.15

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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.