Home / 639,961.40-959,682.90-219,020.60

Finding the Fourth Proportional to 639,961.40, 959,682.90 and 219,020.60

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Solution

The fourth proportional to 639,961.40, 959,682.90 and 219,020.60 is: 328,442.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,961.40 : 959,682.90 = 219,020.60 : x
  2. Step 2: Convert to fraction form
    639,961.40/959,682.90 = 219,020.60/x
  3. Step 3: Cross multiply
    639,961.40x = 959,682.90 × 219,020.60
  4. Step 4: Simplify right side
    639,961.40x = 210,190,324,567.74
  5. Step 5: Solve for x
    x = 210,190,324,567.74/639,961.40
  6. Step 6: Final answer
    x = 328,442.19

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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.