Home / 3,211.86-4,817.10-1,020.78

Finding the Fourth Proportional to 3,211.86, 4,817.10 and 1,020.78

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Solution

The fourth proportional to 3,211.86, 4,817.10 and 1,020.78 is: 1,530.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.86 : 4,817.10 = 1,020.78 : x
  2. Step 2: Convert to fraction form
    3,211.86/4,817.10 = 1,020.78/x
  3. Step 3: Cross multiply
    3,211.86x = 4,817.10 × 1,020.78
  4. Step 4: Simplify right side
    3,211.86x = 4,917,199.34
  5. Step 5: Solve for x
    x = 4,917,199.34/3,211.86
  6. Step 6: Final answer
    x = 1,530.95

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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.