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Finding the Fourth Proportional to 1,326.14, 1,986.74 and 667.24

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Solution

The fourth proportional to 1,326.14, 1,986.74 and 667.24 is: 999.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.14 : 1,986.74 = 667.24 : x
  2. Step 2: Convert to fraction form
    1,326.14/1,986.74 = 667.24/x
  3. Step 3: Cross multiply
    1,326.14x = 1,986.74 × 667.24
  4. Step 4: Simplify right side
    1,326.14x = 1,325,632.40
  5. Step 5: Solve for x
    x = 1,325,632.40/1,326.14
  6. Step 6: Final answer
    x = 999.62

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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.