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Finding the Fourth Proportional to 516.36, 712.56 and 283.47

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Solution

The fourth proportional to 516.36, 712.56 and 283.47 is: 391.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.36 : 712.56 = 283.47 : x
  2. Step 2: Convert to fraction form
    516.36/712.56 = 283.47/x
  3. Step 3: Cross multiply
    516.36x = 712.56 × 283.47
  4. Step 4: Simplify right side
    516.36x = 201,989.38
  5. Step 5: Solve for x
    x = 201,989.38/516.36
  6. Step 6: Final answer
    x = 391.18

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Double scale
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Similar ratio
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1.5x scale

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.