Home / 3,178.86-4,386.96-1,781.64

Finding the Fourth Proportional to 3,178.86, 4,386.96 and 1,781.64

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Solution

The fourth proportional to 3,178.86, 4,386.96 and 1,781.64 is: 2,458.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.86 : 4,386.96 = 1,781.64 : x
  2. Step 2: Convert to fraction form
    3,178.86/4,386.96 = 1,781.64/x
  3. Step 3: Cross multiply
    3,178.86x = 4,386.96 × 1,781.64
  4. Step 4: Simplify right side
    3,178.86x = 7,815,983.41
  5. Step 5: Solve for x
    x = 7,815,983.41/3,178.86
  6. Step 6: Final answer
    x = 2,458.74

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