Home / 1,126.09-1,689.39-395.67

Finding the Fourth Proportional to 1,126.09, 1,689.39 and 395.67

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Solution

The fourth proportional to 1,126.09, 1,689.39 and 395.67 is: 593.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.09 : 1,689.39 = 395.67 : x
  2. Step 2: Convert to fraction form
    1,126.09/1,689.39 = 395.67/x
  3. Step 3: Cross multiply
    1,126.09x = 1,689.39 × 395.67
  4. Step 4: Simplify right side
    1,126.09x = 668,431.51
  5. Step 5: Solve for x
    x = 668,431.51/1,126.09
  6. Step 6: Final answer
    x = 593.59

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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.