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Finding the Fourth Proportional to 995.02, 1,375.85 and 839.57

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Solution

The fourth proportional to 995.02, 1,375.85 and 839.57 is: 1,160.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.02 : 1,375.85 = 839.57 : x
  2. Step 2: Convert to fraction form
    995.02/1,375.85 = 839.57/x
  3. Step 3: Cross multiply
    995.02x = 1,375.85 × 839.57
  4. Step 4: Simplify right side
    995.02x = 1,155,117.60
  5. Step 5: Solve for x
    x = 1,155,117.60/995.02
  6. Step 6: Final answer
    x = 1,160.90

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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.