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Finding the Fourth Proportional to 995.11, 1,373.40 and 716.26

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Solution

The fourth proportional to 995.11, 1,373.40 and 716.26 is: 988.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.11 : 1,373.40 = 716.26 : x
  2. Step 2: Convert to fraction form
    995.11/1,373.40 = 716.26/x
  3. Step 3: Cross multiply
    995.11x = 1,373.40 × 716.26
  4. Step 4: Simplify right side
    995.11x = 983,711.48
  5. Step 5: Solve for x
    x = 983,711.48/995.11
  6. Step 6: Final answer
    x = 988.55

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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.