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Finding the Fourth Proportional to 4,891.30, 7,324.80 and 3,919.30

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Solution

The fourth proportional to 4,891.30, 7,324.80 and 3,919.30 is: 5,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.30 : 7,324.80 = 3,919.30 : x
  2. Step 2: Convert to fraction form
    4,891.30/7,324.80 = 3,919.30/x
  3. Step 3: Cross multiply
    4,891.30x = 7,324.80 × 3,919.30
  4. Step 4: Simplify right side
    4,891.30x = 28,708,088.64
  5. Step 5: Solve for x
    x = 28,708,088.64/4,891.30
  6. Step 6: Final answer
    x = 5,869.21

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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.