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Finding the Fourth Proportional to 515.46, 711.29 and 282.59

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Solution

The fourth proportional to 515.46, 711.29 and 282.59 is: 389.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.46 : 711.29 = 282.59 : x
  2. Step 2: Convert to fraction form
    515.46/711.29 = 282.59/x
  3. Step 3: Cross multiply
    515.46x = 711.29 × 282.59
  4. Step 4: Simplify right side
    515.46x = 201,000.59
  5. Step 5: Solve for x
    x = 201,000.59/515.46
  6. Step 6: Final answer
    x = 389.94

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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.