Home / 1,139.51-1,568.58-982.67

Finding the Fourth Proportional to 1,139.51, 1,568.58 and 982.67

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Solution

The fourth proportional to 1,139.51, 1,568.58 and 982.67 is: 1,352.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.51 : 1,568.58 = 982.67 : x
  2. Step 2: Convert to fraction form
    1,139.51/1,568.58 = 982.67/x
  3. Step 3: Cross multiply
    1,139.51x = 1,568.58 × 982.67
  4. Step 4: Simplify right side
    1,139.51x = 1,541,384.98
  5. Step 5: Solve for x
    x = 1,541,384.98/1,139.51
  6. Step 6: Final answer
    x = 1,352.67

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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.