Home / 2,639.52-3,640.32-2,289.60

Finding the Fourth Proportional to 2,639.52, 3,640.32 and 2,289.60

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Solution

The fourth proportional to 2,639.52, 3,640.32 and 2,289.60 is: 3,157.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.52 : 3,640.32 = 2,289.60 : x
  2. Step 2: Convert to fraction form
    2,639.52/3,640.32 = 2,289.60/x
  3. Step 3: Cross multiply
    2,639.52x = 3,640.32 × 2,289.60
  4. Step 4: Simplify right side
    2,639.52x = 8,334,876.67
  5. Step 5: Solve for x
    x = 8,334,876.67/2,639.52
  6. Step 6: Final answer
    x = 3,157.72

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1.5x scale

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.