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Finding the Fourth Proportional to 405,568.50, 608,308.94 and 135,666.05

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Solution

The fourth proportional to 405,568.50, 608,308.94 and 135,666.05 is: 203,484.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,568.50 : 608,308.94 = 135,666.05 : x
  2. Step 2: Convert to fraction form
    405,568.50/608,308.94 = 135,666.05/x
  3. Step 3: Cross multiply
    405,568.50x = 608,308.94 × 135,666.05
  4. Step 4: Simplify right side
    405,568.50x = 82,526,867,349.61
  5. Step 5: Solve for x
    x = 82,526,867,349.61/405,568.50
  6. Step 6: Final answer
    x = 203,484.41

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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.