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Finding the Fourth Proportional to 568.67, 784.69 and 319.95

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Solution

The fourth proportional to 568.67, 784.69 and 319.95 is: 441.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.67 : 784.69 = 319.95 : x
  2. Step 2: Convert to fraction form
    568.67/784.69 = 319.95/x
  3. Step 3: Cross multiply
    568.67x = 784.69 × 319.95
  4. Step 4: Simplify right side
    568.67x = 251,061.57
  5. Step 5: Solve for x
    x = 251,061.57/568.67
  6. Step 6: Final answer
    x = 441.49

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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.