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Finding the Fourth Proportional to 492,812.20, 739,218.30 and 443,045.80

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Solution

The fourth proportional to 492,812.20, 739,218.30 and 443,045.80 is: 664,568.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,812.20 : 739,218.30 = 443,045.80 : x
  2. Step 2: Convert to fraction form
    492,812.20/739,218.30 = 443,045.80/x
  3. Step 3: Cross multiply
    492,812.20x = 739,218.30 × 443,045.80
  4. Step 4: Simplify right side
    492,812.20x = 327,507,563,098.14
  5. Step 5: Solve for x
    x = 327,507,563,098.14/492,812.20
  6. Step 6: Final answer
    x = 664,568.70

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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.