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Finding the Fourth Proportional to 1,993.55, 2,990.79 and 606.79

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Solution

The fourth proportional to 1,993.55, 2,990.79 and 606.79 is: 910.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.55 : 2,990.79 = 606.79 : x
  2. Step 2: Convert to fraction form
    1,993.55/2,990.79 = 606.79/x
  3. Step 3: Cross multiply
    1,993.55x = 2,990.79 × 606.79
  4. Step 4: Simplify right side
    1,993.55x = 1,814,785.20
  5. Step 5: Solve for x
    x = 1,814,785.20/1,993.55
  6. Step 6: Final answer
    x = 910.33

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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.