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Finding the Fourth Proportional to 995.99, 1,375.09 and 681.77

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Solution

The fourth proportional to 995.99, 1,375.09 and 681.77 is: 941.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.99 : 1,375.09 = 681.77 : x
  2. Step 2: Convert to fraction form
    995.99/1,375.09 = 681.77/x
  3. Step 3: Cross multiply
    995.99x = 1,375.09 × 681.77
  4. Step 4: Simplify right side
    995.99x = 937,496.84
  5. Step 5: Solve for x
    x = 937,496.84/995.99
  6. Step 6: Final answer
    x = 941.28

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1.5x scale

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.