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Finding the Fourth Proportional to 420,571.66, 630,387.26 and 220,913.14

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Solution

The fourth proportional to 420,571.66, 630,387.26 and 220,913.14 is: 331,122.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,571.66 : 630,387.26 = 220,913.14 : x
  2. Step 2: Convert to fraction form
    420,571.66/630,387.26 = 220,913.14/x
  3. Step 3: Cross multiply
    420,571.66x = 630,387.26 × 220,913.14
  4. Step 4: Simplify right side
    420,571.66x = 139,260,824,766.09
  5. Step 5: Solve for x
    x = 139,260,824,766.09/420,571.66
  6. Step 6: Final answer
    x = 331,122.71

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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.