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Finding the Fourth Proportional to 517.88, 775.40 and 414.60

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Solution

The fourth proportional to 517.88, 775.40 and 414.60 is: 620.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.88 : 775.40 = 414.60 : x
  2. Step 2: Convert to fraction form
    517.88/775.40 = 414.60/x
  3. Step 3: Cross multiply
    517.88x = 775.40 × 414.60
  4. Step 4: Simplify right side
    517.88x = 321,478.77
  5. Step 5: Solve for x
    x = 321,478.77/517.88
  6. Step 6: Final answer
    x = 620.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.