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Finding the Fourth Proportional to 3,781.92, 5,673.64 and 1,316.93

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Solution

The fourth proportional to 3,781.92, 5,673.64 and 1,316.93 is: 1,975.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.92 : 5,673.64 = 1,316.93 : x
  2. Step 2: Convert to fraction form
    3,781.92/5,673.64 = 1,316.93/x
  3. Step 3: Cross multiply
    3,781.92x = 5,673.64 × 1,316.93
  4. Step 4: Simplify right side
    3,781.92x = 7,471,784.98
  5. Step 5: Solve for x
    x = 7,471,784.98/3,781.92
  6. Step 6: Final answer
    x = 1,975.66

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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.