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Finding the Fourth Proportional to 995.42, 1,373.84 and 716.58

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Solution

The fourth proportional to 995.42, 1,373.84 and 716.58 is: 988.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.42 : 1,373.84 = 716.58 : x
  2. Step 2: Convert to fraction form
    995.42/1,373.84 = 716.58/x
  3. Step 3: Cross multiply
    995.42x = 1,373.84 × 716.58
  4. Step 4: Simplify right side
    995.42x = 984,462.68
  5. Step 5: Solve for x
    x = 984,462.68/995.42
  6. Step 6: Final answer
    x = 988.99

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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.