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Finding the Fourth Proportional to 2,927.12, 4,391.28 and 979.34

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Solution

The fourth proportional to 2,927.12, 4,391.28 and 979.34 is: 1,469.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,927.12 : 4,391.28 = 979.34 : x
  2. Step 2: Convert to fraction form
    2,927.12/4,391.28 = 979.34/x
  3. Step 3: Cross multiply
    2,927.12x = 4,391.28 × 979.34
  4. Step 4: Simplify right side
    2,927.12x = 4,300,556.16
  5. Step 5: Solve for x
    x = 4,300,556.16/2,927.12
  6. Step 6: Final answer
    x = 1,469.21

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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.