Home / 1,666.85-2,297.77-1,399.30

Finding the Fourth Proportional to 1,666.85, 2,297.77 and 1,399.30

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Solution

The fourth proportional to 1,666.85, 2,297.77 and 1,399.30 is: 1,928.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.85 : 2,297.77 = 1,399.30 : x
  2. Step 2: Convert to fraction form
    1,666.85/2,297.77 = 1,399.30/x
  3. Step 3: Cross multiply
    1,666.85x = 2,297.77 × 1,399.30
  4. Step 4: Simplify right side
    1,666.85x = 3,215,260.32
  5. Step 5: Solve for x
    x = 3,215,260.32/1,666.85
  6. Step 6: Final answer
    x = 1,928.95

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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.