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Finding the Fourth Proportional to 3,935.96, 5,903.94 and 1,985.48

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Solution

The fourth proportional to 3,935.96, 5,903.94 and 1,985.48 is: 2,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.96 : 5,903.94 = 1,985.48 : x
  2. Step 2: Convert to fraction form
    3,935.96/5,903.94 = 1,985.48/x
  3. Step 3: Cross multiply
    3,935.96x = 5,903.94 × 1,985.48
  4. Step 4: Simplify right side
    3,935.96x = 11,722,154.79
  5. Step 5: Solve for x
    x = 11,722,154.79/3,935.96
  6. Step 6: Final answer
    x = 2,978.22

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Similar ratio
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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.