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Finding the Fourth Proportional to 328,861.20, 493,522.20 and 210,819.60

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Solution

The fourth proportional to 328,861.20, 493,522.20 and 210,819.60 is: 316,377.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,861.20 : 493,522.20 = 210,819.60 : x
  2. Step 2: Convert to fraction form
    328,861.20/493,522.20 = 210,819.60/x
  3. Step 3: Cross multiply
    328,861.20x = 493,522.20 × 210,819.60
  4. Step 4: Simplify right side
    328,861.20x = 104,044,152,795.12
  5. Step 5: Solve for x
    x = 104,044,152,795.12/328,861.20
  6. Step 6: Final answer
    x = 316,377.10

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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.