Home / 1,054.21-1,581.34-323.79

Finding the Fourth Proportional to 1,054.21, 1,581.34 and 323.79

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Solution

The fourth proportional to 1,054.21, 1,581.34 and 323.79 is: 485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.21 : 1,581.34 = 323.79 : x
  2. Step 2: Convert to fraction form
    1,054.21/1,581.34 = 323.79/x
  3. Step 3: Cross multiply
    1,054.21x = 1,581.34 × 323.79
  4. Step 4: Simplify right side
    1,054.21x = 512,021.27
  5. Step 5: Solve for x
    x = 512,021.27/1,054.21
  6. Step 6: Final answer
    x = 485.69

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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.