Home / 2,126.28-3,188.66-739.28

Finding the Fourth Proportional to 2,126.28, 3,188.66 and 739.28

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Solution

The fourth proportional to 2,126.28, 3,188.66 and 739.28 is: 1,108.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.28 : 3,188.66 = 739.28 : x
  2. Step 2: Convert to fraction form
    2,126.28/3,188.66 = 739.28/x
  3. Step 3: Cross multiply
    2,126.28x = 3,188.66 × 739.28
  4. Step 4: Simplify right side
    2,126.28x = 2,357,312.56
  5. Step 5: Solve for x
    x = 2,357,312.56/2,126.28
  6. Step 6: Final answer
    x = 1,108.66

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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.