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Finding the Fourth Proportional to 3,959.68, 5,939.52 and 2,421.76

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Solution

The fourth proportional to 3,959.68, 5,939.52 and 2,421.76 is: 3,632.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.68 : 5,939.52 = 2,421.76 : x
  2. Step 2: Convert to fraction form
    3,959.68/5,939.52 = 2,421.76/x
  3. Step 3: Cross multiply
    3,959.68x = 5,939.52 × 2,421.76
  4. Step 4: Simplify right side
    3,959.68x = 14,384,091.96
  5. Step 5: Solve for x
    x = 14,384,091.96/3,959.68
  6. Step 6: Final answer
    x = 3,632.64

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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.