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Finding the Fourth Proportional to 941.28, 1,297.40 and 862.83

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Solution

The fourth proportional to 941.28, 1,297.40 and 862.83 is: 1,189.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.28 : 1,297.40 = 862.83 : x
  2. Step 2: Convert to fraction form
    941.28/1,297.40 = 862.83/x
  3. Step 3: Cross multiply
    941.28x = 1,297.40 × 862.83
  4. Step 4: Simplify right side
    941.28x = 1,119,431.33
  5. Step 5: Solve for x
    x = 1,119,431.33/941.28
  6. Step 6: Final answer
    x = 1,189.26

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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.