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Finding the Fourth Proportional to 603.87, 833.01 and 393.78

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Solution

The fourth proportional to 603.87, 833.01 and 393.78 is: 543.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.87 : 833.01 = 393.78 : x
  2. Step 2: Convert to fraction form
    603.87/833.01 = 393.78/x
  3. Step 3: Cross multiply
    603.87x = 833.01 × 393.78
  4. Step 4: Simplify right side
    603.87x = 328,022.68
  5. Step 5: Solve for x
    x = 328,022.68/603.87
  6. Step 6: Final answer
    x = 543.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.