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Finding the Fourth Proportional to 3,453.45, 5,180.97 and 988.29

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Solution

The fourth proportional to 3,453.45, 5,180.97 and 988.29 is: 1,482.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,453.45 : 5,180.97 = 988.29 : x
  2. Step 2: Convert to fraction form
    3,453.45/5,180.97 = 988.29/x
  3. Step 3: Cross multiply
    3,453.45x = 5,180.97 × 988.29
  4. Step 4: Simplify right side
    3,453.45x = 5,120,300.84
  5. Step 5: Solve for x
    x = 5,120,300.84/3,453.45
  6. Step 6: Final answer
    x = 1,482.66

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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.