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Finding the Fourth Proportional to 1,266.64, 1,745.96 and 1,230.19

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Solution

The fourth proportional to 1,266.64, 1,745.96 and 1,230.19 is: 1,695.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.64 : 1,745.96 = 1,230.19 : x
  2. Step 2: Convert to fraction form
    1,266.64/1,745.96 = 1,230.19/x
  3. Step 3: Cross multiply
    1,266.64x = 1,745.96 × 1,230.19
  4. Step 4: Simplify right side
    1,266.64x = 2,147,852.02
  5. Step 5: Solve for x
    x = 2,147,852.02/1,266.64
  6. Step 6: Final answer
    x = 1,695.71

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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.