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Finding the Fourth Proportional to 568.16, 783.96 and 319.43

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Solution

The fourth proportional to 568.16, 783.96 and 319.43 is: 440.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.16 : 783.96 = 319.43 : x
  2. Step 2: Convert to fraction form
    568.16/783.96 = 319.43/x
  3. Step 3: Cross multiply
    568.16x = 783.96 × 319.43
  4. Step 4: Simplify right side
    568.16x = 250,419.39
  5. Step 5: Solve for x
    x = 250,419.39/568.16
  6. Step 6: Final answer
    x = 440.76

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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.