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Finding the Fourth Proportional to 620.15, 856.14 and 410.25

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Solution

The fourth proportional to 620.15, 856.14 and 410.25 is: 566.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.15 : 856.14 = 410.25 : x
  2. Step 2: Convert to fraction form
    620.15/856.14 = 410.25/x
  3. Step 3: Cross multiply
    620.15x = 856.14 × 410.25
  4. Step 4: Simplify right side
    620.15x = 351,231.44
  5. Step 5: Solve for x
    x = 351,231.44/620.15
  6. Step 6: Final answer
    x = 566.37

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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.