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Finding the Fourth Proportional to 620.20, 854.04 and 445.24

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Solution

The fourth proportional to 620.20, 854.04 and 445.24 is: 613.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.20 : 854.04 = 445.24 : x
  2. Step 2: Convert to fraction form
    620.20/854.04 = 445.24/x
  3. Step 3: Cross multiply
    620.20x = 854.04 × 445.24
  4. Step 4: Simplify right side
    620.20x = 380,252.77
  5. Step 5: Solve for x
    x = 380,252.77/620.20
  6. Step 6: Final answer
    x = 613.11

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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.