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Finding the Fourth Proportional to 482,640.90, 723,839.90 and 198,410.72

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Solution

The fourth proportional to 482,640.90, 723,839.90 and 198,410.72 is: 297,566.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,640.90 : 723,839.90 = 198,410.72 : x
  2. Step 2: Convert to fraction form
    482,640.90/723,839.90 = 198,410.72/x
  3. Step 3: Cross multiply
    482,640.90x = 723,839.90 × 198,410.72
  4. Step 4: Simplify right side
    482,640.90x = 143,617,591,112.48
  5. Step 5: Solve for x
    x = 143,617,591,112.48/482,640.90
  6. Step 6: Final answer
    x = 297,566.14

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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.