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Finding the Fourth Proportional to 640,808.37, 961,312.23 and 214,212.15

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Solution

The fourth proportional to 640,808.37, 961,312.23 and 214,212.15 is: 321,351.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,808.37 : 961,312.23 = 214,212.15 : x
  2. Step 2: Convert to fraction form
    640,808.37/961,312.23 = 214,212.15/x
  3. Step 3: Cross multiply
    640,808.37x = 961,312.23 × 214,212.15
  4. Step 4: Simplify right side
    640,808.37x = 205,924,759,609.59
  5. Step 5: Solve for x
    x = 205,924,759,609.59/640,808.37
  6. Step 6: Final answer
    x = 321,351.54

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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.