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Finding the Fourth Proportional to 4,478.90, 6,180.90 and 2,489.64

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Solution

The fourth proportional to 4,478.90, 6,180.90 and 2,489.64 is: 3,435.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478.90 : 6,180.90 = 2,489.64 : x
  2. Step 2: Convert to fraction form
    4,478.90/6,180.90 = 2,489.64/x
  3. Step 3: Cross multiply
    4,478.90x = 6,180.90 × 2,489.64
  4. Step 4: Simplify right side
    4,478.90x = 15,388,225.21
  5. Step 5: Solve for x
    x = 15,388,225.21/4,478.90
  6. Step 6: Final answer
    x = 3,435.72

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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.