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Finding the Fourth Proportional to 639,078.18, 959,112.99 and 240,081.90

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Solution

The fourth proportional to 639,078.18, 959,112.99 and 240,081.90 is: 360,309.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,078.18 : 959,112.99 = 240,081.90 : x
  2. Step 2: Convert to fraction form
    639,078.18/959,112.99 = 240,081.90/x
  3. Step 3: Cross multiply
    639,078.18x = 959,112.99 × 240,081.90
  4. Step 4: Simplify right side
    639,078.18x = 230,265,668,953.88
  5. Step 5: Solve for x
    x = 230,265,668,953.88/639,078.18
  6. Step 6: Final answer
    x = 360,309.08

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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.