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Finding the Fourth Proportional to 2,815.81, 3,885.82 and 1,573.81

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Solution

The fourth proportional to 2,815.81, 3,885.82 and 1,573.81 is: 2,171.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.81 : 3,885.82 = 1,573.81 : x
  2. Step 2: Convert to fraction form
    2,815.81/3,885.82 = 1,573.81/x
  3. Step 3: Cross multiply
    2,815.81x = 3,885.82 × 1,573.81
  4. Step 4: Simplify right side
    2,815.81x = 6,115,542.37
  5. Step 5: Solve for x
    x = 6,115,542.37/2,815.81
  6. Step 6: Final answer
    x = 2,171.86

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1.5x scale

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.