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Finding the Fourth Proportional to 1,697, 2,342 and 979.41

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Solution

The fourth proportional to 1,697, 2,342 and 979.41 is: 1,351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,697 : 2,342 = 979.41 : x
  2. Step 2: Convert to fraction form
    1,697/2,342 = 979.41/x
  3. Step 3: Cross multiply
    1,697x = 2,342 × 979.41
  4. Step 4: Simplify right side
    1,697x = 2,293,778.22
  5. Step 5: Solve for x
    x = 2,293,778.22/1,697
  6. Step 6: Final answer
    x = 1,351.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.