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Finding the Fourth Proportional to 1,206.10, 1,662.49 and 984.67

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Solution

The fourth proportional to 1,206.10, 1,662.49 and 984.67 is: 1,357.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.10 : 1,662.49 = 984.67 : x
  2. Step 2: Convert to fraction form
    1,206.10/1,662.49 = 984.67/x
  3. Step 3: Cross multiply
    1,206.10x = 1,662.49 × 984.67
  4. Step 4: Simplify right side
    1,206.10x = 1,637,004.03
  5. Step 5: Solve for x
    x = 1,637,004.03/1,206.10
  6. Step 6: Final answer
    x = 1,357.27

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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.