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Finding the Fourth Proportional to 620.94, 857.02 and 358.92

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Solution

The fourth proportional to 620.94, 857.02 and 358.92 is: 495.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.94 : 857.02 = 358.92 : x
  2. Step 2: Convert to fraction form
    620.94/857.02 = 358.92/x
  3. Step 3: Cross multiply
    620.94x = 857.02 × 358.92
  4. Step 4: Simplify right side
    620.94x = 307,601.62
  5. Step 5: Solve for x
    x = 307,601.62/620.94
  6. Step 6: Final answer
    x = 495.38

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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.