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Finding the Fourth Proportional to 2,990.68, 4,485.69 and 799.58

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Solution

The fourth proportional to 2,990.68, 4,485.69 and 799.58 is: 1,199.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.68 : 4,485.69 = 799.58 : x
  2. Step 2: Convert to fraction form
    2,990.68/4,485.69 = 799.58/x
  3. Step 3: Cross multiply
    2,990.68x = 4,485.69 × 799.58
  4. Step 4: Simplify right side
    2,990.68x = 3,586,681.60
  5. Step 5: Solve for x
    x = 3,586,681.60/2,990.68
  6. Step 6: Final answer
    x = 1,199.28

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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.