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Finding the Fourth Proportional to 620.28, 855.92 and 344.28

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Solution

The fourth proportional to 620.28, 855.92 and 344.28 is: 475.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.28 : 855.92 = 344.28 : x
  2. Step 2: Convert to fraction form
    620.28/855.92 = 344.28/x
  3. Step 3: Cross multiply
    620.28x = 855.92 × 344.28
  4. Step 4: Simplify right side
    620.28x = 294,676.14
  5. Step 5: Solve for x
    x = 294,676.14/620.28
  6. Step 6: Final answer
    x = 475.07

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1.5x scale

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.