Home / 3,178.22-4,386-1,780.97

Finding the Fourth Proportional to 3,178.22, 4,386 and 1,780.97

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Solution

The fourth proportional to 3,178.22, 4,386 and 1,780.97 is: 2,457.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.22 : 4,386 = 1,780.97 : x
  2. Step 2: Convert to fraction form
    3,178.22/4,386 = 1,780.97/x
  3. Step 3: Cross multiply
    3,178.22x = 4,386 × 1,780.97
  4. Step 4: Simplify right side
    3,178.22x = 7,811,334.42
  5. Step 5: Solve for x
    x = 7,811,334.42/3,178.22
  6. Step 6: Final answer
    x = 2,457.77

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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.