Home / 1,435.20-2,141.31-1,279.28

Finding the Fourth Proportional to 1,435.20, 2,141.31 and 1,279.28

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Solution

The fourth proportional to 1,435.20, 2,141.31 and 1,279.28 is: 1,908.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.20 : 2,141.31 = 1,279.28 : x
  2. Step 2: Convert to fraction form
    1,435.20/2,141.31 = 1,279.28/x
  3. Step 3: Cross multiply
    1,435.20x = 2,141.31 × 1,279.28
  4. Step 4: Simplify right side
    1,435.20x = 2,739,324.35
  5. Step 5: Solve for x
    x = 2,739,324.35/1,435.20
  6. Step 6: Final answer
    x = 1,908.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.