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Finding the Fourth Proportional to 3,605.85, 4,982.85 and 2,720.16

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Solution

The fourth proportional to 3,605.85, 4,982.85 and 2,720.16 is: 3,758.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,605.85 : 4,982.85 = 2,720.16 : x
  2. Step 2: Convert to fraction form
    3,605.85/4,982.85 = 2,720.16/x
  3. Step 3: Cross multiply
    3,605.85x = 4,982.85 × 2,720.16
  4. Step 4: Simplify right side
    3,605.85x = 13,554,149.26
  5. Step 5: Solve for x
    x = 13,554,149.26/3,605.85
  6. Step 6: Final answer
    x = 3,758.93

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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.