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Finding the Fourth Proportional to 3,918.39, 5,877.62 and 996.71

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Solution

The fourth proportional to 3,918.39, 5,877.62 and 996.71 is: 1,495.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.39 : 5,877.62 = 996.71 : x
  2. Step 2: Convert to fraction form
    3,918.39/5,877.62 = 996.71/x
  3. Step 3: Cross multiply
    3,918.39x = 5,877.62 × 996.71
  4. Step 4: Simplify right side
    3,918.39x = 5,858,248.26
  5. Step 5: Solve for x
    x = 5,858,248.26/3,918.39
  6. Step 6: Final answer
    x = 1,495.07

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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.