Home / 1,284.18-1,926.78-668.27

Finding the Fourth Proportional to 1,284.18, 1,926.78 and 668.27

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Solution

The fourth proportional to 1,284.18, 1,926.78 and 668.27 is: 1,002.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.18 : 1,926.78 = 668.27 : x
  2. Step 2: Convert to fraction form
    1,284.18/1,926.78 = 668.27/x
  3. Step 3: Cross multiply
    1,284.18x = 1,926.78 × 668.27
  4. Step 4: Simplify right side
    1,284.18x = 1,287,609.27
  5. Step 5: Solve for x
    x = 1,287,609.27/1,284.18
  6. Step 6: Final answer
    x = 1,002.67

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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.