Home / 3,178.62-4,386.52-1,781.38

Finding the Fourth Proportional to 3,178.62, 4,386.52 and 1,781.38

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Solution

The fourth proportional to 3,178.62, 4,386.52 and 1,781.38 is: 2,458.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.62 : 4,386.52 = 1,781.38 : x
  2. Step 2: Convert to fraction form
    3,178.62/4,386.52 = 1,781.38/x
  3. Step 3: Cross multiply
    3,178.62x = 4,386.52 × 1,781.38
  4. Step 4: Simplify right side
    3,178.62x = 7,814,059.00
  5. Step 5: Solve for x
    x = 7,814,059.00/3,178.62
  6. Step 6: Final answer
    x = 2,458.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.