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Finding the Fourth Proportional to 3,486.70, 5,220.90 and 3,284.41

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Solution

The fourth proportional to 3,486.70, 5,220.90 and 3,284.41 is: 4,918.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.70 : 5,220.90 = 3,284.41 : x
  2. Step 2: Convert to fraction form
    3,486.70/5,220.90 = 3,284.41/x
  3. Step 3: Cross multiply
    3,486.70x = 5,220.90 × 3,284.41
  4. Step 4: Simplify right side
    3,486.70x = 17,147,576.17
  5. Step 5: Solve for x
    x = 17,147,576.17/3,486.70
  6. Step 6: Final answer
    x = 4,918.00

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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.