Home / 3,278.80-4,918.20-1,330.48

Finding the Fourth Proportional to 3,278.80, 4,918.20 and 1,330.48

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Solution

The fourth proportional to 3,278.80, 4,918.20 and 1,330.48 is: 1,995.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278.80 : 4,918.20 = 1,330.48 : x
  2. Step 2: Convert to fraction form
    3,278.80/4,918.20 = 1,330.48/x
  3. Step 3: Cross multiply
    3,278.80x = 4,918.20 × 1,330.48
  4. Step 4: Simplify right side
    3,278.80x = 6,543,566.74
  5. Step 5: Solve for x
    x = 6,543,566.74/3,278.80
  6. Step 6: Final answer
    x = 1,995.72

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1.5x scale

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.