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Finding the Fourth Proportional to 2,990.30, 4,485.68 and 798.98

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Solution

The fourth proportional to 2,990.30, 4,485.68 and 798.98 is: 1,198.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.30 : 4,485.68 = 798.98 : x
  2. Step 2: Convert to fraction form
    2,990.30/4,485.68 = 798.98/x
  3. Step 3: Cross multiply
    2,990.30x = 4,485.68 × 798.98
  4. Step 4: Simplify right side
    2,990.30x = 3,583,964.61
  5. Step 5: Solve for x
    x = 3,583,964.61/2,990.30
  6. Step 6: Final answer
    x = 1,198.53

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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.