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Finding the Fourth Proportional to 568.73, 784.65 and 319.99

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Solution

The fourth proportional to 568.73, 784.65 and 319.99 is: 441.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.73 : 784.65 = 319.99 : x
  2. Step 2: Convert to fraction form
    568.73/784.65 = 319.99/x
  3. Step 3: Cross multiply
    568.73x = 784.65 × 319.99
  4. Step 4: Simplify right side
    568.73x = 251,080.15
  5. Step 5: Solve for x
    x = 251,080.15/568.73
  6. Step 6: Final answer
    x = 441.48

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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.