Home / 1,245.36-1,867.91-320.89

Finding the Fourth Proportional to 1,245.36, 1,867.91 and 320.89

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Solution

The fourth proportional to 1,245.36, 1,867.91 and 320.89 is: 481.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.36 : 1,867.91 = 320.89 : x
  2. Step 2: Convert to fraction form
    1,245.36/1,867.91 = 320.89/x
  3. Step 3: Cross multiply
    1,245.36x = 1,867.91 × 320.89
  4. Step 4: Simplify right side
    1,245.36x = 599,389.77
  5. Step 5: Solve for x
    x = 599,389.77/1,245.36
  6. Step 6: Final answer
    x = 481.30

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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.