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Finding the Fourth Proportional to 3,455.28, 4,788.45 and 3,389.64

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Solution

The fourth proportional to 3,455.28, 4,788.45 and 3,389.64 is: 4,697.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.28 : 4,788.45 = 3,389.64 : x
  2. Step 2: Convert to fraction form
    3,455.28/4,788.45 = 3,389.64/x
  3. Step 3: Cross multiply
    3,455.28x = 4,788.45 × 3,389.64
  4. Step 4: Simplify right side
    3,455.28x = 16,231,121.66
  5. Step 5: Solve for x
    x = 16,231,121.66/3,455.28
  6. Step 6: Final answer
    x = 4,697.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.