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Finding the Fourth Proportional to 420,359.86, 630,876.06 and 220,797.94

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Solution

The fourth proportional to 420,359.86, 630,876.06 and 220,797.94 is: 331,373.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,359.86 : 630,876.06 = 220,797.94 : x
  2. Step 2: Convert to fraction form
    420,359.86/630,876.06 = 220,797.94/x
  3. Step 3: Cross multiply
    420,359.86x = 630,876.06 × 220,797.94
  4. Step 4: Simplify right side
    420,359.86x = 139,296,134,443.32
  5. Step 5: Solve for x
    x = 139,296,134,443.32/420,359.86
  6. Step 6: Final answer
    x = 331,373.54

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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.