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Finding the Fourth Proportional to 620.94, 857.00 and 359.11

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Solution

The fourth proportional to 620.94, 857.00 and 359.11 is: 495.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.94 : 857.00 = 359.11 : x
  2. Step 2: Convert to fraction form
    620.94/857.00 = 359.11/x
  3. Step 3: Cross multiply
    620.94x = 857.00 × 359.11
  4. Step 4: Simplify right side
    620.94x = 307,756.03
  5. Step 5: Solve for x
    x = 307,756.03/620.94
  6. Step 6: Final answer
    x = 495.63

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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.