Home / 426,945.60-640,407.37-138,755.63

Finding the Fourth Proportional to 426,945.60, 640,407.37 and 138,755.63

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Solution

The fourth proportional to 426,945.60, 640,407.37 and 138,755.63 is: 208,129.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,945.60 : 640,407.37 = 138,755.63 : x
  2. Step 2: Convert to fraction form
    426,945.60/640,407.37 = 138,755.63/x
  3. Step 3: Cross multiply
    426,945.60x = 640,407.37 × 138,755.63
  4. Step 4: Simplify right side
    426,945.60x = 88,860,124,185.18
  5. Step 5: Solve for x
    x = 88,860,124,185.18/426,945.60
  6. Step 6: Final answer
    x = 208,129.85

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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.