Home / 2,638.81-3,640.03-1,707.31

Finding the Fourth Proportional to 2,638.81, 3,640.03 and 1,707.31

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Solution

The fourth proportional to 2,638.81, 3,640.03 and 1,707.31 is: 2,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.81 : 3,640.03 = 1,707.31 : x
  2. Step 2: Convert to fraction form
    2,638.81/3,640.03 = 1,707.31/x
  3. Step 3: Cross multiply
    2,638.81x = 3,640.03 × 1,707.31
  4. Step 4: Simplify right side
    2,638.81x = 6,214,659.62
  5. Step 5: Solve for x
    x = 6,214,659.62/2,638.81
  6. Step 6: Final answer
    x = 2,355.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.