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Finding the Fourth Proportional to 2,670.42, 3,999.86 and 1,938.39

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Solution

The fourth proportional to 2,670.42, 3,999.86 and 1,938.39 is: 2,903.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,670.42 : 3,999.86 = 1,938.39 : x
  2. Step 2: Convert to fraction form
    2,670.42/3,999.86 = 1,938.39/x
  3. Step 3: Cross multiply
    2,670.42x = 3,999.86 × 1,938.39
  4. Step 4: Simplify right side
    2,670.42x = 7,753,278.93
  5. Step 5: Solve for x
    x = 7,753,278.93/2,670.42
  6. Step 6: Final answer
    x = 2,903.39

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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.