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Finding the Fourth Proportional to 568.80, 784.62 and 393.84

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Solution

The fourth proportional to 568.80, 784.62 and 393.84 is: 543.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.80 : 784.62 = 393.84 : x
  2. Step 2: Convert to fraction form
    568.80/784.62 = 393.84/x
  3. Step 3: Cross multiply
    568.80x = 784.62 × 393.84
  4. Step 4: Simplify right side
    568.80x = 309,014.74
  5. Step 5: Solve for x
    x = 309,014.74/568.80
  6. Step 6: Final answer
    x = 543.27

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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.