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Finding the Fourth Proportional to 3,959.76, 5,939.04 and 1,186.80

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Solution

The fourth proportional to 3,959.76, 5,939.04 and 1,186.80 is: 1,780.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.76 : 5,939.04 = 1,186.80 : x
  2. Step 2: Convert to fraction form
    3,959.76/5,939.04 = 1,186.80/x
  3. Step 3: Cross multiply
    3,959.76x = 5,939.04 × 1,186.80
  4. Step 4: Simplify right side
    3,959.76x = 7,048,452.67
  5. Step 5: Solve for x
    x = 7,048,452.67/3,959.76
  6. Step 6: Final answer
    x = 1,780.02

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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.