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Finding the Fourth Proportional to 517.18, 775.77 and 448.60

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Solution

The fourth proportional to 517.18, 775.77 and 448.60 is: 672.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.18 : 775.77 = 448.60 : x
  2. Step 2: Convert to fraction form
    517.18/775.77 = 448.60/x
  3. Step 3: Cross multiply
    517.18x = 775.77 × 448.60
  4. Step 4: Simplify right side
    517.18x = 348,010.42
  5. Step 5: Solve for x
    x = 348,010.42/517.18
  6. Step 6: Final answer
    x = 672.90

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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.