Home / 2,989.29-4,478.98-2,107.49

Finding the Fourth Proportional to 2,989.29, 4,478.98 and 2,107.49

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Solution

The fourth proportional to 2,989.29, 4,478.98 and 2,107.49 is: 3,157.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.29 : 4,478.98 = 2,107.49 : x
  2. Step 2: Convert to fraction form
    2,989.29/4,478.98 = 2,107.49/x
  3. Step 3: Cross multiply
    2,989.29x = 4,478.98 × 2,107.49
  4. Step 4: Simplify right side
    2,989.29x = 9,439,428.53
  5. Step 5: Solve for x
    x = 9,439,428.53/2,989.29
  6. Step 6: Final answer
    x = 3,157.75

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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.