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Finding the Fourth Proportional to 3,542.88, 5,312.77 and 1,786.80

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Solution

The fourth proportional to 3,542.88, 5,312.77 and 1,786.80 is: 2,679.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,542.88 : 5,312.77 = 1,786.80 : x
  2. Step 2: Convert to fraction form
    3,542.88/5,312.77 = 1,786.80/x
  3. Step 3: Cross multiply
    3,542.88x = 5,312.77 × 1,786.80
  4. Step 4: Simplify right side
    3,542.88x = 9,492,857.44
  5. Step 5: Solve for x
    x = 9,492,857.44/3,542.88
  6. Step 6: Final answer
    x = 2,679.42

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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.