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Finding the Fourth Proportional to 620.28, 856.18 and 410.64

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Solution

The fourth proportional to 620.28, 856.18 and 410.64 is: 566.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.28 : 856.18 = 410.64 : x
  2. Step 2: Convert to fraction form
    620.28/856.18 = 410.64/x
  3. Step 3: Cross multiply
    620.28x = 856.18 × 410.64
  4. Step 4: Simplify right side
    620.28x = 351,581.76
  5. Step 5: Solve for x
    x = 351,581.76/620.28
  6. Step 6: Final answer
    x = 566.81

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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.