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Finding the Fourth Proportional to 405,501.91, 608,188.95 and 135,628

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Solution

The fourth proportional to 405,501.91, 608,188.95 and 135,628 is: 203,420.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,501.91 : 608,188.95 = 135,628 : x
  2. Step 2: Convert to fraction form
    405,501.91/608,188.95 = 135,628/x
  3. Step 3: Cross multiply
    405,501.91x = 608,188.95 × 135,628
  4. Step 4: Simplify right side
    405,501.91x = 82,487,450,910.60
  5. Step 5: Solve for x
    x = 82,487,450,910.60/405,501.91
  6. Step 6: Final answer
    x = 203,420.62

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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.