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Finding the Fourth Proportional to 5,216.81, 7,199.51 and 2,979.41

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Solution

The fourth proportional to 5,216.81, 7,199.51 and 2,979.41 is: 4,111.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,216.81 : 7,199.51 = 2,979.41 : x
  2. Step 2: Convert to fraction form
    5,216.81/7,199.51 = 2,979.41/x
  3. Step 3: Cross multiply
    5,216.81x = 7,199.51 × 2,979.41
  4. Step 4: Simplify right side
    5,216.81x = 21,450,292.09
  5. Step 5: Solve for x
    x = 21,450,292.09/5,216.81
  6. Step 6: Final answer
    x = 4,111.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.