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Finding the Fourth Proportional to 620.46, 854.89 and 520.52

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Solution

The fourth proportional to 620.46, 854.89 and 520.52 is: 717.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.46 : 854.89 = 520.52 : x
  2. Step 2: Convert to fraction form
    620.46/854.89 = 520.52/x
  3. Step 3: Cross multiply
    620.46x = 854.89 × 520.52
  4. Step 4: Simplify right side
    620.46x = 444,984.74
  5. Step 5: Solve for x
    x = 444,984.74/620.46
  6. Step 6: Final answer
    x = 717.19

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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.