Home / 3,240.40-4,860.60-1,685.20

Finding the Fourth Proportional to 3,240.40, 4,860.60 and 1,685.20

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Solution

The fourth proportional to 3,240.40, 4,860.60 and 1,685.20 is: 2,527.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.40 : 4,860.60 = 1,685.20 : x
  2. Step 2: Convert to fraction form
    3,240.40/4,860.60 = 1,685.20/x
  3. Step 3: Cross multiply
    3,240.40x = 4,860.60 × 1,685.20
  4. Step 4: Simplify right side
    3,240.40x = 8,191,083.12
  5. Step 5: Solve for x
    x = 8,191,083.12/3,240.40
  6. Step 6: Final answer
    x = 2,527.80

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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.