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Finding the Fourth Proportional to 833.55, 1,149.21 and 683.61

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Solution

The fourth proportional to 833.55, 1,149.21 and 683.61 is: 942.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.55 : 1,149.21 = 683.61 : x
  2. Step 2: Convert to fraction form
    833.55/1,149.21 = 683.61/x
  3. Step 3: Cross multiply
    833.55x = 1,149.21 × 683.61
  4. Step 4: Simplify right side
    833.55x = 785,611.45
  5. Step 5: Solve for x
    x = 785,611.45/833.55
  6. Step 6: Final answer
    x = 942.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.