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Finding the Fourth Proportional to 3,613.22, 4,985.80 and 2,019.96

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Solution

The fourth proportional to 3,613.22, 4,985.80 and 2,019.96 is: 2,787.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.22 : 4,985.80 = 2,019.96 : x
  2. Step 2: Convert to fraction form
    3,613.22/4,985.80 = 2,019.96/x
  3. Step 3: Cross multiply
    3,613.22x = 4,985.80 × 2,019.96
  4. Step 4: Simplify right side
    3,613.22x = 10,071,116.57
  5. Step 5: Solve for x
    x = 10,071,116.57/3,613.22
  6. Step 6: Final answer
    x = 2,787.30

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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.