Home / 1,112.21-1,668.61-926.11

Finding the Fourth Proportional to 1,112.21, 1,668.61 and 926.11

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Solution

The fourth proportional to 1,112.21, 1,668.61 and 926.11 is: 1,389.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.21 : 1,668.61 = 926.11 : x
  2. Step 2: Convert to fraction form
    1,112.21/1,668.61 = 926.11/x
  3. Step 3: Cross multiply
    1,112.21x = 1,668.61 × 926.11
  4. Step 4: Simplify right side
    1,112.21x = 1,545,308.06
  5. Step 5: Solve for x
    x = 1,545,308.06/1,112.21
  6. Step 6: Final answer
    x = 1,389.40

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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.