Home / 2,126.32-3,189.69-665.08

Finding the Fourth Proportional to 2,126.32, 3,189.69 and 665.08

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Solution

The fourth proportional to 2,126.32, 3,189.69 and 665.08 is: 997.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.32 : 3,189.69 = 665.08 : x
  2. Step 2: Convert to fraction form
    2,126.32/3,189.69 = 665.08/x
  3. Step 3: Cross multiply
    2,126.32x = 3,189.69 × 665.08
  4. Step 4: Simplify right side
    2,126.32x = 2,121,399.03
  5. Step 5: Solve for x
    x = 2,121,399.03/2,126.32
  6. Step 6: Final answer
    x = 997.69

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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.