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Finding the Fourth Proportional to 1,271.98, 1,755.63 and 829.11

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Solution

The fourth proportional to 1,271.98, 1,755.63 and 829.11 is: 1,144.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.98 : 1,755.63 = 829.11 : x
  2. Step 2: Convert to fraction form
    1,271.98/1,755.63 = 829.11/x
  3. Step 3: Cross multiply
    1,271.98x = 1,755.63 × 829.11
  4. Step 4: Simplify right side
    1,271.98x = 1,455,610.39
  5. Step 5: Solve for x
    x = 1,455,610.39/1,271.98
  6. Step 6: Final answer
    x = 1,144.37

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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.