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Finding the Fourth Proportional to 639,782.31, 959,676.18 and 166,433.50

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Solution

The fourth proportional to 639,782.31, 959,676.18 and 166,433.50 is: 249,650.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,782.31 : 959,676.18 = 166,433.50 : x
  2. Step 2: Convert to fraction form
    639,782.31/959,676.18 = 166,433.50/x
  3. Step 3: Cross multiply
    639,782.31x = 959,676.18 × 166,433.50
  4. Step 4: Simplify right side
    639,782.31x = 159,722,265,504.03
  5. Step 5: Solve for x
    x = 159,722,265,504.03/639,782.31
  6. Step 6: Final answer
    x = 249,650.96

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1.5x scale

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.