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Finding the Fourth Proportional to 636,640.37, 955,215.74 and 231,860.78

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Solution

The fourth proportional to 636,640.37, 955,215.74 and 231,860.78 is: 347,884.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,640.37 : 955,215.74 = 231,860.78 : x
  2. Step 2: Convert to fraction form
    636,640.37/955,215.74 = 231,860.78/x
  3. Step 3: Cross multiply
    636,640.37x = 955,215.74 × 231,860.78
  4. Step 4: Simplify right side
    636,640.37x = 221,477,064,626.09
  5. Step 5: Solve for x
    x = 221,477,064,626.09/636,640.37
  6. Step 6: Final answer
    x = 347,884.10

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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.