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Finding the Fourth Proportional to 393,190.20, 590,222.70 and 243,599.40

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Solution

The fourth proportional to 393,190.20, 590,222.70 and 243,599.40 is: 365,670.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,190.20 : 590,222.70 = 243,599.40 : x
  2. Step 2: Convert to fraction form
    393,190.20/590,222.70 = 243,599.40/x
  3. Step 3: Cross multiply
    393,190.20x = 590,222.70 × 243,599.40
  4. Step 4: Simplify right side
    393,190.20x = 143,777,895,586.38
  5. Step 5: Solve for x
    x = 143,777,895,586.38/393,190.20
  6. Step 6: Final answer
    x = 365,670.09

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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.