Home / 3,315.45-4,574.70-1,989.30

Finding the Fourth Proportional to 3,315.45, 4,574.70 and 1,989.30

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Solution

The fourth proportional to 3,315.45, 4,574.70 and 1,989.30 is: 2,744.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.45 : 4,574.70 = 1,989.30 : x
  2. Step 2: Convert to fraction form
    3,315.45/4,574.70 = 1,989.30/x
  3. Step 3: Cross multiply
    3,315.45x = 4,574.70 × 1,989.30
  4. Step 4: Simplify right side
    3,315.45x = 9,100,450.71
  5. Step 5: Solve for x
    x = 9,100,450.71/3,315.45
  6. Step 6: Final answer
    x = 2,744.86

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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.