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Finding the Fourth Proportional to 666.18, 992.24 and 631.50

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Solution

The fourth proportional to 666.18, 992.24 and 631.50 is: 940.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.18 : 992.24 = 631.50 : x
  2. Step 2: Convert to fraction form
    666.18/992.24 = 631.50/x
  3. Step 3: Cross multiply
    666.18x = 992.24 × 631.50
  4. Step 4: Simplify right side
    666.18x = 626,599.56
  5. Step 5: Solve for x
    x = 626,599.56/666.18
  6. Step 6: Final answer
    x = 940.59

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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.