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Finding the Fourth Proportional to 666.14, 992.51 and 628.88

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Solution

The fourth proportional to 666.14, 992.51 and 628.88 is: 936.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.14 : 992.51 = 628.88 : x
  2. Step 2: Convert to fraction form
    666.14/992.51 = 628.88/x
  3. Step 3: Cross multiply
    666.14x = 992.51 × 628.88
  4. Step 4: Simplify right side
    666.14x = 624,161.58
  5. Step 5: Solve for x
    x = 624,161.58/666.14
  6. Step 6: Final answer
    x = 936.99

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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.