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Finding the Fourth Proportional to 1,283.56, 1,771.26 and 716.37

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Solution

The fourth proportional to 1,283.56, 1,771.26 and 716.37 is: 988.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.56 : 1,771.26 = 716.37 : x
  2. Step 2: Convert to fraction form
    1,283.56/1,771.26 = 716.37/x
  3. Step 3: Cross multiply
    1,283.56x = 1,771.26 × 716.37
  4. Step 4: Simplify right side
    1,283.56x = 1,268,877.53
  5. Step 5: Solve for x
    x = 1,268,877.53/1,283.56
  6. Step 6: Final answer
    x = 988.56

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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.