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Finding the Fourth Proportional to 574.79, 865.24 and 515.25

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Solution

The fourth proportional to 574.79, 865.24 and 515.25 is: 775.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.79 : 865.24 = 515.25 : x
  2. Step 2: Convert to fraction form
    574.79/865.24 = 515.25/x
  3. Step 3: Cross multiply
    574.79x = 865.24 × 515.25
  4. Step 4: Simplify right side
    574.79x = 445,813.62
  5. Step 5: Solve for x
    x = 445,813.62/574.79
  6. Step 6: Final answer
    x = 775.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.