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Finding the Fourth Proportional to 515.41, 711.27 and 282.54

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Solution

The fourth proportional to 515.41, 711.27 and 282.54 is: 389.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.41 : 711.27 = 282.54 : x
  2. Step 2: Convert to fraction form
    515.41/711.27 = 282.54/x
  3. Step 3: Cross multiply
    515.41x = 711.27 × 282.54
  4. Step 4: Simplify right side
    515.41x = 200,962.23
  5. Step 5: Solve for x
    x = 200,962.23/515.41
  6. Step 6: Final answer
    x = 389.91

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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.