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Finding the Fourth Proportional to 713.64, 985.02 and 516.78

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Solution

The fourth proportional to 713.64, 985.02 and 516.78 is: 713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.64 : 985.02 = 516.78 : x
  2. Step 2: Convert to fraction form
    713.64/985.02 = 516.78/x
  3. Step 3: Cross multiply
    713.64x = 985.02 × 516.78
  4. Step 4: Simplify right side
    713.64x = 509,038.64
  5. Step 5: Solve for x
    x = 509,038.64/713.64
  6. Step 6: Final answer
    x = 713.30

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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.