Home / 3,211.80-4,818.90-1,265.36

Finding the Fourth Proportional to 3,211.80, 4,818.90 and 1,265.36

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Solution

The fourth proportional to 3,211.80, 4,818.90 and 1,265.36 is: 1,898.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.80 : 4,818.90 = 1,265.36 : x
  2. Step 2: Convert to fraction form
    3,211.80/4,818.90 = 1,265.36/x
  3. Step 3: Cross multiply
    3,211.80x = 4,818.90 × 1,265.36
  4. Step 4: Simplify right side
    3,211.80x = 6,097,643.30
  5. Step 5: Solve for x
    x = 6,097,643.30/3,211.80
  6. Step 6: Final answer
    x = 1,898.51

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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.