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Finding the Fourth Proportional to 3,323.99, 4,979.68 and 1,987.03

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Solution

The fourth proportional to 3,323.99, 4,979.68 and 1,987.03 is: 2,976.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,323.99 : 4,979.68 = 1,987.03 : x
  2. Step 2: Convert to fraction form
    3,323.99/4,979.68 = 1,987.03/x
  3. Step 3: Cross multiply
    3,323.99x = 4,979.68 × 1,987.03
  4. Step 4: Simplify right side
    3,323.99x = 9,894,774.81
  5. Step 5: Solve for x
    x = 9,894,774.81/3,323.99
  6. Step 6: Final answer
    x = 2,976.78

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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.