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Finding the Fourth Proportional to 995.95, 1,372.91 and 716.77

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Solution

The fourth proportional to 995.95, 1,372.91 and 716.77 is: 988.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.95 : 1,372.91 = 716.77 : x
  2. Step 2: Convert to fraction form
    995.95/1,372.91 = 716.77/x
  3. Step 3: Cross multiply
    995.95x = 1,372.91 × 716.77
  4. Step 4: Simplify right side
    995.95x = 984,060.70
  5. Step 5: Solve for x
    x = 984,060.70/995.95
  6. Step 6: Final answer
    x = 988.06

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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.