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Finding the Fourth Proportional to 661.89, 993.06 and 251.09

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Solution

The fourth proportional to 661.89, 993.06 and 251.09 is: 376.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.89 : 993.06 = 251.09 : x
  2. Step 2: Convert to fraction form
    661.89/993.06 = 251.09/x
  3. Step 3: Cross multiply
    661.89x = 993.06 × 251.09
  4. Step 4: Simplify right side
    661.89x = 249,342.47
  5. Step 5: Solve for x
    x = 249,342.47/661.89
  6. Step 6: Final answer
    x = 376.71

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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.