Home / 1,309.25-1,964.38-443.56

Finding the Fourth Proportional to 1,309.25, 1,964.38 and 443.56

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Solution

The fourth proportional to 1,309.25, 1,964.38 and 443.56 is: 665.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.25 : 1,964.38 = 443.56 : x
  2. Step 2: Convert to fraction form
    1,309.25/1,964.38 = 443.56/x
  3. Step 3: Cross multiply
    1,309.25x = 1,964.38 × 443.56
  4. Step 4: Simplify right side
    1,309.25x = 871,320.39
  5. Step 5: Solve for x
    x = 871,320.39/1,309.25
  6. Step 6: Final answer
    x = 665.51

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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.