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Finding the Fourth Proportional to 683.62, 1,026.84 and 665.39

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Solution

The fourth proportional to 683.62, 1,026.84 and 665.39 is: 999.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.62 : 1,026.84 = 665.39 : x
  2. Step 2: Convert to fraction form
    683.62/1,026.84 = 665.39/x
  3. Step 3: Cross multiply
    683.62x = 1,026.84 × 665.39
  4. Step 4: Simplify right side
    683.62x = 683,249.07
  5. Step 5: Solve for x
    x = 683,249.07/683.62
  6. Step 6: Final answer
    x = 999.46

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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.