Home / 1,012.19-1,518.26-318.89

Finding the Fourth Proportional to 1,012.19, 1,518.26 and 318.89

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Solution

The fourth proportional to 1,012.19, 1,518.26 and 318.89 is: 478.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.19 : 1,518.26 = 318.89 : x
  2. Step 2: Convert to fraction form
    1,012.19/1,518.26 = 318.89/x
  3. Step 3: Cross multiply
    1,012.19x = 1,518.26 × 318.89
  4. Step 4: Simplify right side
    1,012.19x = 484,157.93
  5. Step 5: Solve for x
    x = 484,157.93/1,012.19
  6. Step 6: Final answer
    x = 478.33

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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.