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Finding the Fourth Proportional to 4,984.64, 6,879.84 and 3,118.40

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Solution

The fourth proportional to 4,984.64, 6,879.84 and 3,118.40 is: 4,304.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,984.64 : 6,879.84 = 3,118.40 : x
  2. Step 2: Convert to fraction form
    4,984.64/6,879.84 = 3,118.40/x
  3. Step 3: Cross multiply
    4,984.64x = 6,879.84 × 3,118.40
  4. Step 4: Simplify right side
    4,984.64x = 21,454,093.06
  5. Step 5: Solve for x
    x = 21,454,093.06/4,984.64
  6. Step 6: Final answer
    x = 4,304.04

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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.