Home / 4,409.78-6,617.27-1,638.40

Finding the Fourth Proportional to 4,409.78, 6,617.27 and 1,638.40

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Solution

The fourth proportional to 4,409.78, 6,617.27 and 1,638.40 is: 2,458.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,409.78 : 6,617.27 = 1,638.40 : x
  2. Step 2: Convert to fraction form
    4,409.78/6,617.27 = 1,638.40/x
  3. Step 3: Cross multiply
    4,409.78x = 6,617.27 × 1,638.40
  4. Step 4: Simplify right side
    4,409.78x = 10,841,735.17
  5. Step 5: Solve for x
    x = 10,841,735.17/4,409.78
  6. Step 6: Final answer
    x = 2,458.57

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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.