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Finding the Fourth Proportional to 4,478.87, 6,719.45 and 3,165.21

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Solution

The fourth proportional to 4,478.87, 6,719.45 and 3,165.21 is: 4,748.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478.87 : 6,719.45 = 3,165.21 : x
  2. Step 2: Convert to fraction form
    4,478.87/6,719.45 = 3,165.21/x
  3. Step 3: Cross multiply
    4,478.87x = 6,719.45 × 3,165.21
  4. Step 4: Simplify right side
    4,478.87x = 21,268,454.51
  5. Step 5: Solve for x
    x = 21,268,454.51/4,478.87
  6. Step 6: Final answer
    x = 4,748.62

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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.