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Finding the Fourth Proportional to 405,577.11, 608,438.90 and 135,679.67

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Solution

The fourth proportional to 405,577.11, 608,438.90 and 135,679.67 is: 203,544.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,577.11 : 608,438.90 = 135,679.67 : x
  2. Step 2: Convert to fraction form
    405,577.11/608,438.90 = 135,679.67/x
  3. Step 3: Cross multiply
    405,577.11x = 608,438.90 × 135,679.67
  4. Step 4: Simplify right side
    405,577.11x = 82,552,789,167.16
  5. Step 5: Solve for x
    x = 82,552,789,167.16/405,577.11
  6. Step 6: Final answer
    x = 203,544.00

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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.