Home / 1,054.29-1,581.44-323.78

Finding the Fourth Proportional to 1,054.29, 1,581.44 and 323.78

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Solution

The fourth proportional to 1,054.29, 1,581.44 and 323.78 is: 485.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.29 : 1,581.44 = 323.78 : x
  2. Step 2: Convert to fraction form
    1,054.29/1,581.44 = 323.78/x
  3. Step 3: Cross multiply
    1,054.29x = 1,581.44 × 323.78
  4. Step 4: Simplify right side
    1,054.29x = 512,029.12
  5. Step 5: Solve for x
    x = 512,029.12/1,054.29
  6. Step 6: Final answer
    x = 485.66

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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.