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Finding the Fourth Proportional to 568.62, 784.08 and 494.28

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Solution

The fourth proportional to 568.62, 784.08 and 494.28 is: 681.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.62 : 784.08 = 494.28 : x
  2. Step 2: Convert to fraction form
    568.62/784.08 = 494.28/x
  3. Step 3: Cross multiply
    568.62x = 784.08 × 494.28
  4. Step 4: Simplify right side
    568.62x = 387,555.06
  5. Step 5: Solve for x
    x = 387,555.06/568.62
  6. Step 6: Final answer
    x = 681.57

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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.