Home / 2,789.16-4,178.64-1,305.66

Finding the Fourth Proportional to 2,789.16, 4,178.64 and 1,305.66

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Solution

The fourth proportional to 2,789.16, 4,178.64 and 1,305.66 is: 1,956.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.16 : 4,178.64 = 1,305.66 : x
  2. Step 2: Convert to fraction form
    2,789.16/4,178.64 = 1,305.66/x
  3. Step 3: Cross multiply
    2,789.16x = 4,178.64 × 1,305.66
  4. Step 4: Simplify right side
    2,789.16x = 5,455,883.10
  5. Step 5: Solve for x
    x = 5,455,883.10/2,789.16
  6. Step 6: Final answer
    x = 1,956.10

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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.