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Finding the Fourth Proportional to 640,887.15, 961,385.61 and 167,571.75

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Solution

The fourth proportional to 640,887.15, 961,385.61 and 167,571.75 is: 251,371.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,887.15 : 961,385.61 = 167,571.75 : x
  2. Step 2: Convert to fraction form
    640,887.15/961,385.61 = 167,571.75/x
  3. Step 3: Cross multiply
    640,887.15x = 961,385.61 × 167,571.75
  4. Step 4: Simplify right side
    640,887.15x = 161,101,069,092.52
  5. Step 5: Solve for x
    x = 161,101,069,092.52/640,887.15
  6. Step 6: Final answer
    x = 251,371.98

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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.