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Finding the Fourth Proportional to 516.17, 712.29 and 283.30

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Solution

The fourth proportional to 516.17, 712.29 and 283.30 is: 390.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.17 : 712.29 = 283.30 : x
  2. Step 2: Convert to fraction form
    516.17/712.29 = 283.30/x
  3. Step 3: Cross multiply
    516.17x = 712.29 × 283.30
  4. Step 4: Simplify right side
    516.17x = 201,791.76
  5. Step 5: Solve for x
    x = 201,791.76/516.17
  6. Step 6: Final answer
    x = 390.94

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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.