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Finding the Fourth Proportional to 1,791.06, 2,686.59 and 636.81

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Solution

The fourth proportional to 1,791.06, 2,686.59 and 636.81 is: 955.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.06 : 2,686.59 = 636.81 : x
  2. Step 2: Convert to fraction form
    1,791.06/2,686.59 = 636.81/x
  3. Step 3: Cross multiply
    1,791.06x = 2,686.59 × 636.81
  4. Step 4: Simplify right side
    1,791.06x = 1,710,847.38
  5. Step 5: Solve for x
    x = 1,710,847.38/1,791.06
  6. Step 6: Final answer
    x = 955.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.