Home / 3,813.20-5,718.08-1,620.80

Finding the Fourth Proportional to 3,813.20, 5,718.08 and 1,620.80

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Solution

The fourth proportional to 3,813.20, 5,718.08 and 1,620.80 is: 2,430.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.20 : 5,718.08 = 1,620.80 : x
  2. Step 2: Convert to fraction form
    3,813.20/5,718.08 = 1,620.80/x
  3. Step 3: Cross multiply
    3,813.20x = 5,718.08 × 1,620.80
  4. Step 4: Simplify right side
    3,813.20x = 9,267,864.06
  5. Step 5: Solve for x
    x = 9,267,864.06/3,813.20
  6. Step 6: Final answer
    x = 2,430.47

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1.5x scale

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.