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Finding the Fourth Proportional to 1,735.75, 2,602.08 and 639.85

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Solution

The fourth proportional to 1,735.75, 2,602.08 and 639.85 is: 959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,735.75 : 2,602.08 = 639.85 : x
  2. Step 2: Convert to fraction form
    1,735.75/2,602.08 = 639.85/x
  3. Step 3: Cross multiply
    1,735.75x = 2,602.08 × 639.85
  4. Step 4: Simplify right side
    1,735.75x = 1,664,940.89
  5. Step 5: Solve for x
    x = 1,664,940.89/1,735.75
  6. Step 6: Final answer
    x = 959.21

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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.