Home / 3,315.40-4,983.90-2,840.20

Finding the Fourth Proportional to 3,315.40, 4,983.90 and 2,840.20

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Solution

The fourth proportional to 3,315.40, 4,983.90 and 2,840.20 is: 4,269.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.40 : 4,983.90 = 2,840.20 : x
  2. Step 2: Convert to fraction form
    3,315.40/4,983.90 = 2,840.20/x
  3. Step 3: Cross multiply
    3,315.40x = 4,983.90 × 2,840.20
  4. Step 4: Simplify right side
    3,315.40x = 14,155,272.78
  5. Step 5: Solve for x
    x = 14,155,272.78/3,315.40
  6. Step 6: Final answer
    x = 4,269.55

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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.