Home / 2,072.08-3,110.36-840.32

Finding the Fourth Proportional to 2,072.08, 3,110.36 and 840.32

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Solution

The fourth proportional to 2,072.08, 3,110.36 and 840.32 is: 1,261.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.08 : 3,110.36 = 840.32 : x
  2. Step 2: Convert to fraction form
    2,072.08/3,110.36 = 840.32/x
  3. Step 3: Cross multiply
    2,072.08x = 3,110.36 × 840.32
  4. Step 4: Simplify right side
    2,072.08x = 2,613,697.72
  5. Step 5: Solve for x
    x = 2,613,697.72/2,072.08
  6. Step 6: Final answer
    x = 1,261.39

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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.