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Finding the Fourth Proportional to 2,939.99, 4,410.30 and 860.00

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Solution

The fourth proportional to 2,939.99, 4,410.30 and 860.00 is: 1,290.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.99 : 4,410.30 = 860.00 : x
  2. Step 2: Convert to fraction form
    2,939.99/4,410.30 = 860.00/x
  3. Step 3: Cross multiply
    2,939.99x = 4,410.30 × 860.00
  4. Step 4: Simplify right side
    2,939.99x = 3,792,863.80
  5. Step 5: Solve for x
    x = 3,792,863.80/2,939.99
  6. Step 6: Final answer
    x = 1,290.10

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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.