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Finding the Fourth Proportional to 725.81, 1,000.81 and 568.16

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Solution

The fourth proportional to 725.81, 1,000.81 and 568.16 is: 783.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.81 : 1,000.81 = 568.16 : x
  2. Step 2: Convert to fraction form
    725.81/1,000.81 = 568.16/x
  3. Step 3: Cross multiply
    725.81x = 1,000.81 × 568.16
  4. Step 4: Simplify right side
    725.81x = 568,613.79
  5. Step 5: Solve for x
    x = 568,613.79/725.81
  6. Step 6: Final answer
    x = 783.43

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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.