Home / 2,126.24-3,189.12-739.32

Finding the Fourth Proportional to 2,126.24, 3,189.12 and 739.32

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Solution

The fourth proportional to 2,126.24, 3,189.12 and 739.32 is: 1,108.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.24 : 3,189.12 = 739.32 : x
  2. Step 2: Convert to fraction form
    2,126.24/3,189.12 = 739.32/x
  3. Step 3: Cross multiply
    2,126.24x = 3,189.12 × 739.32
  4. Step 4: Simplify right side
    2,126.24x = 2,357,780.20
  5. Step 5: Solve for x
    x = 2,357,780.20/2,126.24
  6. Step 6: Final answer
    x = 1,108.90

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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.