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Finding the Fourth Proportional to 1,815.58, 2,723.33 and 890.15

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Solution

The fourth proportional to 1,815.58, 2,723.33 and 890.15 is: 1,335.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.58 : 2,723.33 = 890.15 : x
  2. Step 2: Convert to fraction form
    1,815.58/2,723.33 = 890.15/x
  3. Step 3: Cross multiply
    1,815.58x = 2,723.33 × 890.15
  4. Step 4: Simplify right side
    1,815.58x = 2,424,181.23
  5. Step 5: Solve for x
    x = 2,424,181.23/1,815.58
  6. Step 6: Final answer
    x = 1,335.21

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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.