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Finding the Fourth Proportional to 3,821.60, 5,269.60 and 2,492.80

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Solution

The fourth proportional to 3,821.60, 5,269.60 and 2,492.80 is: 3,437.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.60 : 5,269.60 = 2,492.80 : x
  2. Step 2: Convert to fraction form
    3,821.60/5,269.60 = 2,492.80/x
  3. Step 3: Cross multiply
    3,821.60x = 5,269.60 × 2,492.80
  4. Step 4: Simplify right side
    3,821.60x = 13,136,058.88
  5. Step 5: Solve for x
    x = 13,136,058.88/3,821.60
  6. Step 6: Final answer
    x = 3,437.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.