Home / 3,918.42-5,877.68-1,145.12

Finding the Fourth Proportional to 3,918.42, 5,877.68 and 1,145.12

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Solution

The fourth proportional to 3,918.42, 5,877.68 and 1,145.12 is: 1,717.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.42 : 5,877.68 = 1,145.12 : x
  2. Step 2: Convert to fraction form
    3,918.42/5,877.68 = 1,145.12/x
  3. Step 3: Cross multiply
    3,918.42x = 5,877.68 × 1,145.12
  4. Step 4: Simplify right side
    3,918.42x = 6,730,613.81
  5. Step 5: Solve for x
    x = 6,730,613.81/3,918.42
  6. Step 6: Final answer
    x = 1,717.69

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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.