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Finding the Fourth Proportional to 1,790.50, 2,685.99 and 636.25

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Solution

The fourth proportional to 1,790.50, 2,685.99 and 636.25 is: 954.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.50 : 2,685.99 = 636.25 : x
  2. Step 2: Convert to fraction form
    1,790.50/2,685.99 = 636.25/x
  3. Step 3: Cross multiply
    1,790.50x = 2,685.99 × 636.25
  4. Step 4: Simplify right side
    1,790.50x = 1,708,961.14
  5. Step 5: Solve for x
    x = 1,708,961.14/1,790.50
  6. Step 6: Final answer
    x = 954.46

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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.