Home / 4,629.86-6,389.20-2,640.40

Finding the Fourth Proportional to 4,629.86, 6,389.20 and 2,640.40

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Solution

The fourth proportional to 4,629.86, 6,389.20 and 2,640.40 is: 3,643.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,629.86 : 6,389.20 = 2,640.40 : x
  2. Step 2: Convert to fraction form
    4,629.86/6,389.20 = 2,640.40/x
  3. Step 3: Cross multiply
    4,629.86x = 6,389.20 × 2,640.40
  4. Step 4: Simplify right side
    4,629.86x = 16,870,043.68
  5. Step 5: Solve for x
    x = 16,870,043.68/4,629.86
  6. Step 6: Final answer
    x = 3,643.75

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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.