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Finding the Fourth Proportional to 325,580.40, 488,346.30 and 135,991.80

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Solution

The fourth proportional to 325,580.40, 488,346.30 and 135,991.80 is: 203,977.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,580.40 : 488,346.30 = 135,991.80 : x
  2. Step 2: Convert to fraction form
    325,580.40/488,346.30 = 135,991.80/x
  3. Step 3: Cross multiply
    325,580.40x = 488,346.30 × 135,991.80
  4. Step 4: Simplify right side
    325,580.40x = 66,411,092,360.34
  5. Step 5: Solve for x
    x = 66,411,092,360.34/325,580.40
  6. Step 6: Final answer
    x = 203,977.55

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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.