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Finding the Fourth Proportional to 3,989.29, 5,987.12 and 1,798.19

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Solution

The fourth proportional to 3,989.29, 5,987.12 and 1,798.19 is: 2,698.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.29 : 5,987.12 = 1,798.19 : x
  2. Step 2: Convert to fraction form
    3,989.29/5,987.12 = 1,798.19/x
  3. Step 3: Cross multiply
    3,989.29x = 5,987.12 × 1,798.19
  4. Step 4: Simplify right side
    3,989.29x = 10,765,965.80
  5. Step 5: Solve for x
    x = 10,765,965.80/3,989.29
  6. Step 6: Final answer
    x = 2,698.72

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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.