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Finding the Fourth Proportional to 433,145.72, 648,709.32 and 421,187.96

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Solution

The fourth proportional to 433,145.72, 648,709.32 and 421,187.96 is: 630,800.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    433,145.72 : 648,709.32 = 421,187.96 : x
  2. Step 2: Convert to fraction form
    433,145.72/648,709.32 = 421,187.96/x
  3. Step 3: Cross multiply
    433,145.72x = 648,709.32 × 421,187.96
  4. Step 4: Simplify right side
    433,145.72x = 273,228,555,123.79
  5. Step 5: Solve for x
    x = 273,228,555,123.79/433,145.72
  6. Step 6: Final answer
    x = 630,800.54

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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.