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Finding the Fourth Proportional to 568.72, 784.56 and 494.92

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Solution

The fourth proportional to 568.72, 784.56 and 494.92 is: 682.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.72 : 784.56 = 494.92 : x
  2. Step 2: Convert to fraction form
    568.72/784.56 = 494.92/x
  3. Step 3: Cross multiply
    568.72x = 784.56 × 494.92
  4. Step 4: Simplify right side
    568.72x = 388,294.44
  5. Step 5: Solve for x
    x = 388,294.44/568.72
  6. Step 6: Final answer
    x = 682.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.