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Finding the Fourth Proportional to 3,781.37, 5,672.64 and 1,931.48

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Solution

The fourth proportional to 3,781.37, 5,672.64 and 1,931.48 is: 2,897.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.37 : 5,672.64 = 1,931.48 : x
  2. Step 2: Convert to fraction form
    3,781.37/5,672.64 = 1,931.48/x
  3. Step 3: Cross multiply
    3,781.37x = 5,672.64 × 1,931.48
  4. Step 4: Simplify right side
    3,781.37x = 10,956,562.34
  5. Step 5: Solve for x
    x = 10,956,562.34/3,781.37
  6. Step 6: Final answer
    x = 2,897.52

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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.