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Finding the Fourth Proportional to 568.01, 783.90 and 319.39

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Solution

The fourth proportional to 568.01, 783.90 and 319.39 is: 440.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.01 : 783.90 = 319.39 : x
  2. Step 2: Convert to fraction form
    568.01/783.90 = 319.39/x
  3. Step 3: Cross multiply
    568.01x = 783.90 × 319.39
  4. Step 4: Simplify right side
    568.01x = 250,367.86
  5. Step 5: Solve for x
    x = 250,367.86/568.01
  6. Step 6: Final answer
    x = 440.78

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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.