Home / 1,370.08-2,055.30-720.85

Finding the Fourth Proportional to 1,370.08, 2,055.30 and 720.85

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Solution

The fourth proportional to 1,370.08, 2,055.30 and 720.85 is: 1,081.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.08 : 2,055.30 = 720.85 : x
  2. Step 2: Convert to fraction form
    1,370.08/2,055.30 = 720.85/x
  3. Step 3: Cross multiply
    1,370.08x = 2,055.30 × 720.85
  4. Step 4: Simplify right side
    1,370.08x = 1,481,563.01
  5. Step 5: Solve for x
    x = 1,481,563.01/1,370.08
  6. Step 6: Final answer
    x = 1,081.37

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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.