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Finding the Fourth Proportional to 568.59, 784.60 and 319.91

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Solution

The fourth proportional to 568.59, 784.60 and 319.91 is: 441.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.59 : 784.60 = 319.91 : x
  2. Step 2: Convert to fraction form
    568.59/784.60 = 319.91/x
  3. Step 3: Cross multiply
    568.59x = 784.60 × 319.91
  4. Step 4: Simplify right side
    568.59x = 251,000.81
  5. Step 5: Solve for x
    x = 251,000.81/568.59
  6. Step 6: Final answer
    x = 441.44

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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.