Home / 1,143.32-1,568.40-1,112.90

Finding the Fourth Proportional to 1,143.32, 1,568.40 and 1,112.90

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Solution

The fourth proportional to 1,143.32, 1,568.40 and 1,112.90 is: 1,526.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.32 : 1,568.40 = 1,112.90 : x
  2. Step 2: Convert to fraction form
    1,143.32/1,568.40 = 1,112.90/x
  3. Step 3: Cross multiply
    1,143.32x = 1,568.40 × 1,112.90
  4. Step 4: Simplify right side
    1,143.32x = 1,745,466.80
  5. Step 5: Solve for x
    x = 1,745,466.80/1,143.32
  6. Step 6: Final answer
    x = 1,526.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.