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Finding the Fourth Proportional to 1,266.89, 1,748.32 and 735.81

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Solution

The fourth proportional to 1,266.89, 1,748.32 and 735.81 is: 1,015.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.89 : 1,748.32 = 735.81 : x
  2. Step 2: Convert to fraction form
    1,266.89/1,748.32 = 735.81/x
  3. Step 3: Cross multiply
    1,266.89x = 1,748.32 × 735.81
  4. Step 4: Simplify right side
    1,266.89x = 1,286,431.34
  5. Step 5: Solve for x
    x = 1,286,431.34/1,266.89
  6. Step 6: Final answer
    x = 1,015.42

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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.