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Finding the Fourth Proportional to 940.82, 1,411.43 and 666.23

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Solution

The fourth proportional to 940.82, 1,411.43 and 666.23 is: 999.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.82 : 1,411.43 = 666.23 : x
  2. Step 2: Convert to fraction form
    940.82/1,411.43 = 666.23/x
  3. Step 3: Cross multiply
    940.82x = 1,411.43 × 666.23
  4. Step 4: Simplify right side
    940.82x = 940,326.62
  5. Step 5: Solve for x
    x = 940,326.62/940.82
  6. Step 6: Final answer
    x = 999.48

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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.