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Finding the Fourth Proportional to 620.36, 856.05 and 358.37

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Solution

The fourth proportional to 620.36, 856.05 and 358.37 is: 494.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.36 : 856.05 = 358.37 : x
  2. Step 2: Convert to fraction form
    620.36/856.05 = 358.37/x
  3. Step 3: Cross multiply
    620.36x = 856.05 × 358.37
  4. Step 4: Simplify right side
    620.36x = 306,778.36
  5. Step 5: Solve for x
    x = 306,778.36/620.36
  6. Step 6: Final answer
    x = 494.52

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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.