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Finding the Fourth Proportional to 620, 929.18 and 517.48

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Solution

The fourth proportional to 620, 929.18 and 517.48 is: 775.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    620 : 929.18 = 517.48 : x
  2. Step 2: Convert to fraction form
    620/929.18 = 517.48/x
  3. Step 3: Cross multiply
    620x = 929.18 × 517.48
  4. Step 4: Simplify right side
    620x = 480,832.07
  5. Step 5: Solve for x
    x = 480,832.07/620
  6. Step 6: Final answer
    x = 775.54

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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.