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Finding the Fourth Proportional to 620.91, 856.83 and 341.12

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Solution

The fourth proportional to 620.91, 856.83 and 341.12 is: 470.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.91 : 856.83 = 341.12 : x
  2. Step 2: Convert to fraction form
    620.91/856.83 = 341.12/x
  3. Step 3: Cross multiply
    620.91x = 856.83 × 341.12
  4. Step 4: Simplify right side
    620.91x = 292,281.85
  5. Step 5: Solve for x
    x = 292,281.85/620.91
  6. Step 6: Final answer
    x = 470.73

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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.