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Finding the Fourth Proportional to 639,959.52, 959,994.41 and 166,645.74

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Solution

The fourth proportional to 639,959.52, 959,994.41 and 166,645.74 is: 249,982.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,959.52 : 959,994.41 = 166,645.74 : x
  2. Step 2: Convert to fraction form
    639,959.52/959,994.41 = 166,645.74/x
  3. Step 3: Cross multiply
    639,959.52x = 959,994.41 × 166,645.74
  4. Step 4: Simplify right side
    639,959.52x = 159,978,978,017.09
  5. Step 5: Solve for x
    x = 159,978,978,017.09/639,959.52
  6. Step 6: Final answer
    x = 249,982.96

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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.