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Finding the Fourth Proportional to 2,928.98, 4,392.08 and 979.80

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Solution

The fourth proportional to 2,928.98, 4,392.08 and 979.80 is: 1,469.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.98 : 4,392.08 = 979.80 : x
  2. Step 2: Convert to fraction form
    2,928.98/4,392.08 = 979.80/x
  3. Step 3: Cross multiply
    2,928.98x = 4,392.08 × 979.80
  4. Step 4: Simplify right side
    2,928.98x = 4,303,359.98
  5. Step 5: Solve for x
    x = 4,303,359.98/2,928.98
  6. Step 6: Final answer
    x = 1,469.24

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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.