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Finding the Fourth Proportional to 515.43, 772.50 and 412.29

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Solution

The fourth proportional to 515.43, 772.50 and 412.29 is: 617.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.43 : 772.50 = 412.29 : x
  2. Step 2: Convert to fraction form
    515.43/772.50 = 412.29/x
  3. Step 3: Cross multiply
    515.43x = 772.50 × 412.29
  4. Step 4: Simplify right side
    515.43x = 318,494.03
  5. Step 5: Solve for x
    x = 318,494.03/515.43
  6. Step 6: Final answer
    x = 617.92

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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.