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Finding the Fourth Proportional to 620.96, 856.85 and 358.97

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Solution

The fourth proportional to 620.96, 856.85 and 358.97 is: 495.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.96 : 856.85 = 358.97 : x
  2. Step 2: Convert to fraction form
    620.96/856.85 = 358.97/x
  3. Step 3: Cross multiply
    620.96x = 856.85 × 358.97
  4. Step 4: Simplify right side
    620.96x = 307,577.37
  5. Step 5: Solve for x
    x = 307,577.37/620.96
  6. Step 6: Final answer
    x = 495.33

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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.