Home / 3,271.78-4,909.80-1,219.78

Finding the Fourth Proportional to 3,271.78, 4,909.80 and 1,219.78

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Solution

The fourth proportional to 3,271.78, 4,909.80 and 1,219.78 is: 1,830.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,271.78 : 4,909.80 = 1,219.78 : x
  2. Step 2: Convert to fraction form
    3,271.78/4,909.80 = 1,219.78/x
  3. Step 3: Cross multiply
    3,271.78x = 4,909.80 × 1,219.78
  4. Step 4: Simplify right side
    3,271.78x = 5,988,875.84
  5. Step 5: Solve for x
    x = 5,988,875.84/3,271.78
  6. Step 6: Final answer
    x = 1,830.46

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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.