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Finding the Fourth Proportional to 515.27, 711.09 and 282.39

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Solution

The fourth proportional to 515.27, 711.09 and 282.39 is: 389.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.27 : 711.09 = 282.39 : x
  2. Step 2: Convert to fraction form
    515.27/711.09 = 282.39/x
  3. Step 3: Cross multiply
    515.27x = 711.09 × 282.39
  4. Step 4: Simplify right side
    515.27x = 200,804.71
  5. Step 5: Solve for x
    x = 200,804.71/515.27
  6. Step 6: Final answer
    x = 389.71

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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.