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Finding the Fourth Proportional to 3,681.60, 5,520.48 and 1,372.80

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Solution

The fourth proportional to 3,681.60, 5,520.48 and 1,372.80 is: 2,058.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681.60 : 5,520.48 = 1,372.80 : x
  2. Step 2: Convert to fraction form
    3,681.60/5,520.48 = 1,372.80/x
  3. Step 3: Cross multiply
    3,681.60x = 5,520.48 × 1,372.80
  4. Step 4: Simplify right side
    3,681.60x = 7,578,514.94
  5. Step 5: Solve for x
    x = 7,578,514.94/3,681.60
  6. Step 6: Final answer
    x = 2,058.48

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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.