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Finding the Fourth Proportional to 568.25, 784.09 and 319.58

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Solution

The fourth proportional to 568.25, 784.09 and 319.58 is: 440.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.25 : 784.09 = 319.58 : x
  2. Step 2: Convert to fraction form
    568.25/784.09 = 319.58/x
  3. Step 3: Cross multiply
    568.25x = 784.09 × 319.58
  4. Step 4: Simplify right side
    568.25x = 250,580.64
  5. Step 5: Solve for x
    x = 250,580.64/568.25
  6. Step 6: Final answer
    x = 440.97

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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.