Home / 426,336.78-639,128.85-173,828.49

Finding the Fourth Proportional to 426,336.78, 639,128.85 and 173,828.49

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Solution

The fourth proportional to 426,336.78, 639,128.85 and 173,828.49 is: 260,589.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,336.78 : 639,128.85 = 173,828.49 : x
  2. Step 2: Convert to fraction form
    426,336.78/639,128.85 = 173,828.49/x
  3. Step 3: Cross multiply
    426,336.78x = 639,128.85 × 173,828.49
  4. Step 4: Simplify right side
    426,336.78x = 111,098,802,910.94
  5. Step 5: Solve for x
    x = 111,098,802,910.94/426,336.78
  6. Step 6: Final answer
    x = 260,589.30

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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.