Home / 2,989.84-4,485.66-1,805.20

Finding the Fourth Proportional to 2,989.84, 4,485.66 and 1,805.20

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Solution

The fourth proportional to 2,989.84, 4,485.66 and 1,805.20 is: 2,708.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.84 : 4,485.66 = 1,805.20 : x
  2. Step 2: Convert to fraction form
    2,989.84/4,485.66 = 1,805.20/x
  3. Step 3: Cross multiply
    2,989.84x = 4,485.66 × 1,805.20
  4. Step 4: Simplify right side
    2,989.84x = 8,097,513.43
  5. Step 5: Solve for x
    x = 8,097,513.43/2,989.84
  6. Step 6: Final answer
    x = 2,708.34

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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.