Home / 1,216.08-1,684.80-1,190.16

Finding the Fourth Proportional to 1,216.08, 1,684.80 and 1,190.16

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Solution

The fourth proportional to 1,216.08, 1,684.80 and 1,190.16 is: 1,648.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.08 : 1,684.80 = 1,190.16 : x
  2. Step 2: Convert to fraction form
    1,216.08/1,684.80 = 1,190.16/x
  3. Step 3: Cross multiply
    1,216.08x = 1,684.80 × 1,190.16
  4. Step 4: Simplify right side
    1,216.08x = 2,005,181.57
  5. Step 5: Solve for x
    x = 2,005,181.57/1,216.08
  6. Step 6: Final answer
    x = 1,648.89

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.