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Finding the Fourth Proportional to 620.10, 855.58 and 371.37

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Solution

The fourth proportional to 620.10, 855.58 and 371.37 is: 512.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.10 : 855.58 = 371.37 : x
  2. Step 2: Convert to fraction form
    620.10/855.58 = 371.37/x
  3. Step 3: Cross multiply
    620.10x = 855.58 × 371.37
  4. Step 4: Simplify right side
    620.10x = 317,734.89
  5. Step 5: Solve for x
    x = 317,734.89/620.10
  6. Step 6: Final answer
    x = 512.40

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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.