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Finding the Fourth Proportional to 398,696.80, 598,045.20 and 383,144.80

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Solution

The fourth proportional to 398,696.80, 598,045.20 and 383,144.80 is: 574,717.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,696.80 : 598,045.20 = 383,144.80 : x
  2. Step 2: Convert to fraction form
    398,696.80/598,045.20 = 383,144.80/x
  3. Step 3: Cross multiply
    398,696.80x = 598,045.20 × 383,144.80
  4. Step 4: Simplify right side
    398,696.80x = 229,137,908,544.96
  5. Step 5: Solve for x
    x = 229,137,908,544.96/398,696.80
  6. Step 6: Final answer
    x = 574,717.20

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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.