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Finding the Fourth Proportional to 420,572.66, 630,388.76 and 220,914.14

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Solution

The fourth proportional to 420,572.66, 630,388.76 and 220,914.14 is: 331,124.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,572.66 : 630,388.76 = 220,914.14 : x
  2. Step 2: Convert to fraction form
    420,572.66/630,388.76 = 220,914.14/x
  3. Step 3: Cross multiply
    420,572.66x = 630,388.76 × 220,914.14
  4. Step 4: Simplify right side
    420,572.66x = 139,261,786,524.55
  5. Step 5: Solve for x
    x = 139,261,786,524.55/420,572.66
  6. Step 6: Final answer
    x = 331,124.21

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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.