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Finding the Fourth Proportional to 640,131.22, 959,572.78 and 255,765.50

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Solution

The fourth proportional to 640,131.22, 959,572.78 and 255,765.50 is: 383,398.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,131.22 : 959,572.78 = 255,765.50 : x
  2. Step 2: Convert to fraction form
    640,131.22/959,572.78 = 255,765.50/x
  3. Step 3: Cross multiply
    640,131.22x = 959,572.78 × 255,765.50
  4. Step 4: Simplify right side
    640,131.22x = 245,425,610,024.21
  5. Step 5: Solve for x
    x = 245,425,610,024.21/640,131.22
  6. Step 6: Final answer
    x = 383,398.91

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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.