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Finding the Fourth Proportional to 620.99, 856.93 and 341.22

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Solution

The fourth proportional to 620.99, 856.93 and 341.22 is: 470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.99 : 856.93 = 341.22 : x
  2. Step 2: Convert to fraction form
    620.99/856.93 = 341.22/x
  3. Step 3: Cross multiply
    620.99x = 856.93 × 341.22
  4. Step 4: Simplify right side
    620.99x = 292,401.65
  5. Step 5: Solve for x
    x = 292,401.65/620.99
  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.