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Finding the Fourth Proportional to 640,896.15, 961,399.10 and 167,580.75

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Solution

The fourth proportional to 640,896.15, 961,399.10 and 167,580.75 is: 251,385.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,896.15 : 961,399.10 = 167,580.75 : x
  2. Step 2: Convert to fraction form
    640,896.15/961,399.10 = 167,580.75/x
  3. Step 3: Cross multiply
    640,896.15x = 961,399.10 × 167,580.75
  4. Step 4: Simplify right side
    640,896.15x = 161,111,982,227.33
  5. Step 5: Solve for x
    x = 161,111,982,227.33/640,896.15
  6. Step 6: Final answer
    x = 251,385.47

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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.