Home / 2,126.30-3,189.24-739.58

Finding the Fourth Proportional to 2,126.30, 3,189.24 and 739.58

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Solution

The fourth proportional to 2,126.30, 3,189.24 and 739.58 is: 1,109.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.30 : 3,189.24 = 739.58 : x
  2. Step 2: Convert to fraction form
    2,126.30/3,189.24 = 739.58/x
  3. Step 3: Cross multiply
    2,126.30x = 3,189.24 × 739.58
  4. Step 4: Simplify right side
    2,126.30x = 2,358,682.17
  5. Step 5: Solve for x
    x = 2,358,682.17/2,126.30
  6. Step 6: Final answer
    x = 1,109.29

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1.5x scale

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.