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Finding the Fourth Proportional to 620.07, 855.69 and 344.07

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Solution

The fourth proportional to 620.07, 855.69 and 344.07 is: 474.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.07 : 855.69 = 344.07 : x
  2. Step 2: Convert to fraction form
    620.07/855.69 = 344.07/x
  3. Step 3: Cross multiply
    620.07x = 855.69 × 344.07
  4. Step 4: Simplify right side
    620.07x = 294,412.98
  5. Step 5: Solve for x
    x = 294,412.98/620.07
  6. Step 6: Final answer
    x = 474.81

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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.