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Finding the Fourth Proportional to 3,959.60, 5,939.40 and 3,700.40

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Solution

The fourth proportional to 3,959.60, 5,939.40 and 3,700.40 is: 5,550.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.60 : 5,939.40 = 3,700.40 : x
  2. Step 2: Convert to fraction form
    3,959.60/5,939.40 = 3,700.40/x
  3. Step 3: Cross multiply
    3,959.60x = 5,939.40 × 3,700.40
  4. Step 4: Simplify right side
    3,959.60x = 21,978,155.76
  5. Step 5: Solve for x
    x = 21,978,155.76/3,959.60
  6. Step 6: Final answer
    x = 5,550.60

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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.