Home / 2,986.10-4,118.57-1,805.70

Finding the Fourth Proportional to 2,986.10, 4,118.57 and 1,805.70

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Solution

The fourth proportional to 2,986.10, 4,118.57 and 1,805.70 is: 2,490.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.10 : 4,118.57 = 1,805.70 : x
  2. Step 2: Convert to fraction form
    2,986.10/4,118.57 = 1,805.70/x
  3. Step 3: Cross multiply
    2,986.10x = 4,118.57 × 1,805.70
  4. Step 4: Simplify right side
    2,986.10x = 7,436,901.85
  5. Step 5: Solve for x
    x = 7,436,901.85/2,986.10
  6. Step 6: Final answer
    x = 2,490.51

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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.