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Finding the Fourth Proportional to 3,649.80, 5,474.70 and 1,801.20

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Solution

The fourth proportional to 3,649.80, 5,474.70 and 1,801.20 is: 2,701.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,649.80 : 5,474.70 = 1,801.20 : x
  2. Step 2: Convert to fraction form
    3,649.80/5,474.70 = 1,801.20/x
  3. Step 3: Cross multiply
    3,649.80x = 5,474.70 × 1,801.20
  4. Step 4: Simplify right side
    3,649.80x = 9,861,029.64
  5. Step 5: Solve for x
    x = 9,861,029.64/3,649.80
  6. Step 6: Final answer
    x = 2,701.80

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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.