Home / 1,211.23-1,817.67-518.08

Finding the Fourth Proportional to 1,211.23, 1,817.67 and 518.08

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Solution

The fourth proportional to 1,211.23, 1,817.67 and 518.08 is: 777.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.23 : 1,817.67 = 518.08 : x
  2. Step 2: Convert to fraction form
    1,211.23/1,817.67 = 518.08/x
  3. Step 3: Cross multiply
    1,211.23x = 1,817.67 × 518.08
  4. Step 4: Simplify right side
    1,211.23x = 941,698.47
  5. Step 5: Solve for x
    x = 941,698.47/1,211.23
  6. Step 6: Final answer
    x = 777.47

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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.