Home / 2,688.08-3,711.72-1,640.72

Finding the Fourth Proportional to 2,688.08, 3,711.72 and 1,640.72

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Solution

The fourth proportional to 2,688.08, 3,711.72 and 1,640.72 is: 2,265.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.08 : 3,711.72 = 1,640.72 : x
  2. Step 2: Convert to fraction form
    2,688.08/3,711.72 = 1,640.72/x
  3. Step 3: Cross multiply
    2,688.08x = 3,711.72 × 1,640.72
  4. Step 4: Simplify right side
    2,688.08x = 6,089,893.24
  5. Step 5: Solve for x
    x = 6,089,893.24/2,688.08
  6. Step 6: Final answer
    x = 2,265.52

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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.