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Finding the Fourth Proportional to 640,744.34, 961,511.79 and 325,427.54

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Solution

The fourth proportional to 640,744.34, 961,511.79 and 325,427.54 is: 488,342.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,744.34 : 961,511.79 = 325,427.54 : x
  2. Step 2: Convert to fraction form
    640,744.34/961,511.79 = 325,427.54/x
  3. Step 3: Cross multiply
    640,744.34x = 961,511.79 × 325,427.54
  4. Step 4: Simplify right side
    640,744.34x = 312,902,416,500.70
  5. Step 5: Solve for x
    x = 312,902,416,500.70/640,744.34
  6. Step 6: Final answer
    x = 488,342.07

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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.