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Finding the Fourth Proportional to 639,959.02, 959,993.66 and 166,645.24

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Solution

The fourth proportional to 639,959.02, 959,993.66 and 166,645.24 is: 249,982.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,959.02 : 959,993.66 = 166,645.24 : x
  2. Step 2: Convert to fraction form
    639,959.02/959,993.66 = 166,645.24/x
  3. Step 3: Cross multiply
    639,959.02x = 959,993.66 × 166,645.24
  4. Step 4: Simplify right side
    639,959.02x = 159,978,373,035.95
  5. Step 5: Solve for x
    x = 159,978,373,035.95/639,959.02
  6. Step 6: Final answer
    x = 249,982.21

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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.