Home / 3,178.79-4,387.59-1,919.88

Finding the Fourth Proportional to 3,178.79, 4,387.59 and 1,919.88

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Solution

The fourth proportional to 3,178.79, 4,387.59 and 1,919.88 is: 2,649.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.79 : 4,387.59 = 1,919.88 : x
  2. Step 2: Convert to fraction form
    3,178.79/4,387.59 = 1,919.88/x
  3. Step 3: Cross multiply
    3,178.79x = 4,387.59 × 1,919.88
  4. Step 4: Simplify right side
    3,178.79x = 8,423,646.29
  5. Step 5: Solve for x
    x = 8,423,646.29/3,178.79
  6. Step 6: Final answer
    x = 2,649.96

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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.