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Finding the Fourth Proportional to 568.12, 783 and 479.44

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Solution

The fourth proportional to 568.12, 783 and 479.44 is: 660.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.12 : 783 = 479.44 : x
  2. Step 2: Convert to fraction form
    568.12/783 = 479.44/x
  3. Step 3: Cross multiply
    568.12x = 783 × 479.44
  4. Step 4: Simplify right side
    568.12x = 375,401.52
  5. Step 5: Solve for x
    x = 375,401.52/568.12
  6. Step 6: Final answer
    x = 660.78

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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.