Home / 3,315.20-4,972.80-3,012.80

Finding the Fourth Proportional to 3,315.20, 4,972.80 and 3,012.80

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Solution

The fourth proportional to 3,315.20, 4,972.80 and 3,012.80 is: 4,519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.20 : 4,972.80 = 3,012.80 : x
  2. Step 2: Convert to fraction form
    3,315.20/4,972.80 = 3,012.80/x
  3. Step 3: Cross multiply
    3,315.20x = 4,972.80 × 3,012.80
  4. Step 4: Simplify right side
    3,315.20x = 14,982,051.84
  5. Step 5: Solve for x
    x = 14,982,051.84/3,315.20
  6. Step 6: Final answer
    x = 4,519.20

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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.