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Finding the Fourth Proportional to 3,321.60, 4,985.10 and 3,213.60

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Solution

The fourth proportional to 3,321.60, 4,985.10 and 3,213.60 is: 4,823.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.60 : 4,985.10 = 3,213.60 : x
  2. Step 2: Convert to fraction form
    3,321.60/4,985.10 = 3,213.60/x
  3. Step 3: Cross multiply
    3,321.60x = 4,985.10 × 3,213.60
  4. Step 4: Simplify right side
    3,321.60x = 16,020,117.36
  5. Step 5: Solve for x
    x = 16,020,117.36/3,321.60
  6. Step 6: Final answer
    x = 4,823.01

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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.