Home / 2,977.80-4,109.36-1,651.60

Finding the Fourth Proportional to 2,977.80, 4,109.36 and 1,651.60

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Solution

The fourth proportional to 2,977.80, 4,109.36 and 1,651.60 is: 2,279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,977.80 : 4,109.36 = 1,651.60 : x
  2. Step 2: Convert to fraction form
    2,977.80/4,109.36 = 1,651.60/x
  3. Step 3: Cross multiply
    2,977.80x = 4,109.36 × 1,651.60
  4. Step 4: Simplify right side
    2,977.80x = 6,787,018.98
  5. Step 5: Solve for x
    x = 6,787,018.98/2,977.80
  6. Step 6: Final answer
    x = 2,279.21

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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.