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Finding the Fourth Proportional to 995.77, 1,375.55 and 887.41

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Solution

The fourth proportional to 995.77, 1,375.55 and 887.41 is: 1,225.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.77 : 1,375.55 = 887.41 : x
  2. Step 2: Convert to fraction form
    995.77/1,375.55 = 887.41/x
  3. Step 3: Cross multiply
    995.77x = 1,375.55 × 887.41
  4. Step 4: Simplify right side
    995.77x = 1,220,676.83
  5. Step 5: Solve for x
    x = 1,220,676.83/995.77
  6. Step 6: Final answer
    x = 1,225.86

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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.