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Finding the Fourth Proportional to 3,158.95, 4,739.49 and 1,987.59

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Solution

The fourth proportional to 3,158.95, 4,739.49 and 1,987.59 is: 2,982.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,158.95 : 4,739.49 = 1,987.59 : x
  2. Step 2: Convert to fraction form
    3,158.95/4,739.49 = 1,987.59/x
  3. Step 3: Cross multiply
    3,158.95x = 4,739.49 × 1,987.59
  4. Step 4: Simplify right side
    3,158.95x = 9,420,162.93
  5. Step 5: Solve for x
    x = 9,420,162.93/3,158.95
  6. Step 6: Final answer
    x = 2,982.06

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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.