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Finding the Fourth Proportional to 666.19, 992.24 and 631.49

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Solution

The fourth proportional to 666.19, 992.24 and 631.49 is: 940.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.19 : 992.24 = 631.49 : x
  2. Step 2: Convert to fraction form
    666.19/992.24 = 631.49/x
  3. Step 3: Cross multiply
    666.19x = 992.24 × 631.49
  4. Step 4: Simplify right side
    666.19x = 626,589.64
  5. Step 5: Solve for x
    x = 626,589.64/666.19
  6. Step 6: Final answer
    x = 940.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.