Home / 1,581.24-2,371.64-485.30

Finding the Fourth Proportional to 1,581.24, 2,371.64 and 485.30

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Solution

The fourth proportional to 1,581.24, 2,371.64 and 485.30 is: 727.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.24 : 2,371.64 = 485.30 : x
  2. Step 2: Convert to fraction form
    1,581.24/2,371.64 = 485.30/x
  3. Step 3: Cross multiply
    1,581.24x = 2,371.64 × 485.30
  4. Step 4: Simplify right side
    1,581.24x = 1,150,956.89
  5. Step 5: Solve for x
    x = 1,150,956.89/1,581.24
  6. Step 6: Final answer
    x = 727.88

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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.