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Finding the Fourth Proportional to 3,975.52, 5,965.20 and 1,785.76

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Solution

The fourth proportional to 3,975.52, 5,965.20 and 1,785.76 is: 2,679.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.52 : 5,965.20 = 1,785.76 : x
  2. Step 2: Convert to fraction form
    3,975.52/5,965.20 = 1,785.76/x
  3. Step 3: Cross multiply
    3,975.52x = 5,965.20 × 1,785.76
  4. Step 4: Simplify right side
    3,975.52x = 10,652,415.55
  5. Step 5: Solve for x
    x = 10,652,415.55/3,975.52
  6. Step 6: Final answer
    x = 2,679.50

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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.