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Finding the Fourth Proportional to 2,384, 3,575.76 and 1,085

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Solution

The fourth proportional to 2,384, 3,575.76 and 1,085 is: 1,627.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,384 : 3,575.76 = 1,085 : x
  2. Step 2: Convert to fraction form
    2,384/3,575.76 = 1,085/x
  3. Step 3: Cross multiply
    2,384x = 3,575.76 × 1,085
  4. Step 4: Simplify right side
    2,384x = 3,879,699.60
  5. Step 5: Solve for x
    x = 3,879,699.60/2,384
  6. Step 6: Final answer
    x = 1,627.39

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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.