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Finding the Fourth Proportional to 568.68, 784.72 and 319.99

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Solution

The fourth proportional to 568.68, 784.72 and 319.99 is: 441.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.68 : 784.72 = 319.99 : x
  2. Step 2: Convert to fraction form
    568.68/784.72 = 319.99/x
  3. Step 3: Cross multiply
    568.68x = 784.72 × 319.99
  4. Step 4: Simplify right side
    568.68x = 251,104.07
  5. Step 5: Solve for x
    x = 251,104.07/568.68
  6. Step 6: Final answer
    x = 441.56

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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.