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Finding the Fourth Proportional to 398,882.70, 598,324.05 and 383,136.30

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Solution

The fourth proportional to 398,882.70, 598,324.05 and 383,136.30 is: 574,704.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,882.70 : 598,324.05 = 383,136.30 : x
  2. Step 2: Convert to fraction form
    398,882.70/598,324.05 = 383,136.30/x
  3. Step 3: Cross multiply
    398,882.70x = 598,324.05 × 383,136.30
  4. Step 4: Simplify right side
    398,882.70x = 229,239,662,718.02
  5. Step 5: Solve for x
    x = 229,239,662,718.02/398,882.70
  6. Step 6: Final answer
    x = 574,704.45

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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.