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Finding the Fourth Proportional to 420,379.92, 630,570.56 and 336,672.50

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Solution

The fourth proportional to 420,379.92, 630,570.56 and 336,672.50 is: 505,009.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,379.92 : 630,570.56 = 336,672.50 : x
  2. Step 2: Convert to fraction form
    420,379.92/630,570.56 = 336,672.50/x
  3. Step 3: Cross multiply
    420,379.92x = 630,570.56 × 336,672.50
  4. Step 4: Simplify right side
    420,379.92x = 212,295,766,861.60
  5. Step 5: Solve for x
    x = 212,295,766,861.60/420,379.92
  6. Step 6: Final answer
    x = 505,009.29

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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.