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Finding the Fourth Proportional to 1,131.67, 1,696.49 and 401.15

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Solution

The fourth proportional to 1,131.67, 1,696.49 and 401.15 is: 601.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.67 : 1,696.49 = 401.15 : x
  2. Step 2: Convert to fraction form
    1,131.67/1,696.49 = 401.15/x
  3. Step 3: Cross multiply
    1,131.67x = 1,696.49 × 401.15
  4. Step 4: Simplify right side
    1,131.67x = 680,536.48
  5. Step 5: Solve for x
    x = 680,536.48/1,131.67
  6. Step 6: Final answer
    x = 601.36

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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.