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Finding the Fourth Proportional to 4,980.81, 6,873.54 and 2,991.40

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Solution

The fourth proportional to 4,980.81, 6,873.54 and 2,991.40 is: 4,128.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.81 : 6,873.54 = 2,991.40 : x
  2. Step 2: Convert to fraction form
    4,980.81/6,873.54 = 2,991.40/x
  3. Step 3: Cross multiply
    4,980.81x = 6,873.54 × 2,991.40
  4. Step 4: Simplify right side
    4,980.81x = 20,561,497.65
  5. Step 5: Solve for x
    x = 20,561,497.65/4,980.81
  6. Step 6: Final answer
    x = 4,128.14

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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.