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Finding the Fourth Proportional to 995.67, 1,380.29 and 942.98

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Solution

The fourth proportional to 995.67, 1,380.29 and 942.98 is: 1,307.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.67 : 1,380.29 = 942.98 : x
  2. Step 2: Convert to fraction form
    995.67/1,380.29 = 942.98/x
  3. Step 3: Cross multiply
    995.67x = 1,380.29 × 942.98
  4. Step 4: Simplify right side
    995.67x = 1,301,574.25
  5. Step 5: Solve for x
    x = 1,301,574.25/995.67
  6. Step 6: Final answer
    x = 1,307.23

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.