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Finding the Fourth Proportional to 620.97, 856.94 and 341.20

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Solution

The fourth proportional to 620.97, 856.94 and 341.20 is: 470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.97 : 856.94 = 341.20 : x
  2. Step 2: Convert to fraction form
    620.97/856.94 = 341.20/x
  3. Step 3: Cross multiply
    620.97x = 856.94 × 341.20
  4. Step 4: Simplify right side
    620.97x = 292,387.93
  5. Step 5: Solve for x
    x = 292,387.93/620.97
  6. Step 6: Final answer
    x = 470.86

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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.