Home / 2,810.91-3,878.45-1,631.35

Finding the Fourth Proportional to 2,810.91, 3,878.45 and 1,631.35

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Solution

The fourth proportional to 2,810.91, 3,878.45 and 1,631.35 is: 2,250.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.91 : 3,878.45 = 1,631.35 : x
  2. Step 2: Convert to fraction form
    2,810.91/3,878.45 = 1,631.35/x
  3. Step 3: Cross multiply
    2,810.91x = 3,878.45 × 1,631.35
  4. Step 4: Simplify right side
    2,810.91x = 6,327,103.79
  5. Step 5: Solve for x
    x = 6,327,103.79/2,810.91
  6. Step 6: Final answer
    x = 2,250.91

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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.