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Finding the Fourth Proportional to 3,406.20, 4,778.40 and 3,406.20

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Solution

The fourth proportional to 3,406.20, 4,778.40 and 3,406.20 is: 4,778.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,406.20 : 4,778.40 = 3,406.20 : x
  2. Step 2: Convert to fraction form
    3,406.20/4,778.40 = 3,406.20/x
  3. Step 3: Cross multiply
    3,406.20x = 4,778.40 × 3,406.20
  4. Step 4: Simplify right side
    3,406.20x = 16,276,186.08
  5. Step 5: Solve for x
    x = 16,276,186.08/3,406.20
  6. Step 6: Final answer
    x = 4,778.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.