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Finding the Fourth Proportional to 4,878.12, 7,300.98 and 3,899.64

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Solution

The fourth proportional to 4,878.12, 7,300.98 and 3,899.64 is: 5,836.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,878.12 : 7,300.98 = 3,899.64 : x
  2. Step 2: Convert to fraction form
    4,878.12/7,300.98 = 3,899.64/x
  3. Step 3: Cross multiply
    4,878.12x = 7,300.98 × 3,899.64
  4. Step 4: Simplify right side
    4,878.12x = 28,471,193.65
  5. Step 5: Solve for x
    x = 28,471,193.65/4,878.12
  6. Step 6: Final answer
    x = 5,836.51

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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.