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Finding the Fourth Proportional to 1,266.26, 1,745.53 and 986.00

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Solution

The fourth proportional to 1,266.26, 1,745.53 and 986.00 is: 1,359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.26 : 1,745.53 = 986.00 : x
  2. Step 2: Convert to fraction form
    1,266.26/1,745.53 = 986.00/x
  3. Step 3: Cross multiply
    1,266.26x = 1,745.53 × 986.00
  4. Step 4: Simplify right side
    1,266.26x = 1,721,094.48
  5. Step 5: Solve for x
    x = 1,721,094.48/1,266.26
  6. Step 6: Final answer
    x = 1,359.19

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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.