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Finding the Fourth Proportional to 620.28, 856.08 and 358.34

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Solution

The fourth proportional to 620.28, 856.08 and 358.34 is: 494.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.28 : 856.08 = 358.34 : x
  2. Step 2: Convert to fraction form
    620.28/856.08 = 358.34/x
  3. Step 3: Cross multiply
    620.28x = 856.08 × 358.34
  4. Step 4: Simplify right side
    620.28x = 306,763.43
  5. Step 5: Solve for x
    x = 306,763.43/620.28
  6. Step 6: Final answer
    x = 494.56

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