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Finding the Fourth Proportional to 620.99, 856.95 and 341.23

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Solution

The fourth proportional to 620.99, 856.95 and 341.23 is: 470.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.99 : 856.95 = 341.23 : x
  2. Step 2: Convert to fraction form
    620.99/856.95 = 341.23/x
  3. Step 3: Cross multiply
    620.99x = 856.95 × 341.23
  4. Step 4: Simplify right side
    620.99x = 292,417.05
  5. Step 5: Solve for x
    x = 292,417.05/620.99
  6. Step 6: Final answer
    x = 470.89

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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.