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Finding the Fourth Proportional to 3,979.74, 5,969.19 and 1,018.20

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Solution

The fourth proportional to 3,979.74, 5,969.19 and 1,018.20 is: 1,527.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.74 : 5,969.19 = 1,018.20 : x
  2. Step 2: Convert to fraction form
    3,979.74/5,969.19 = 1,018.20/x
  3. Step 3: Cross multiply
    3,979.74x = 5,969.19 × 1,018.20
  4. Step 4: Simplify right side
    3,979.74x = 6,077,829.26
  5. Step 5: Solve for x
    x = 6,077,829.26/3,979.74
  6. Step 6: Final answer
    x = 1,527.19

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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.