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Finding the Fourth Proportional to 515.36, 709.64 and 445.29

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Solution

The fourth proportional to 515.36, 709.64 and 445.29 is: 613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.36 : 709.64 = 445.29 : x
  2. Step 2: Convert to fraction form
    515.36/709.64 = 445.29/x
  3. Step 3: Cross multiply
    515.36x = 709.64 × 445.29
  4. Step 4: Simplify right side
    515.36x = 315,995.60
  5. Step 5: Solve for x
    x = 315,995.60/515.36
  6. Step 6: Final answer
    x = 613.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.