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Finding the Fourth Proportional to 568.61, 784.68 and 319.93

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Solution

The fourth proportional to 568.61, 784.68 and 319.93 is: 441.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.61 : 784.68 = 319.93 : x
  2. Step 2: Convert to fraction form
    568.61/784.68 = 319.93/x
  3. Step 3: Cross multiply
    568.61x = 784.68 × 319.93
  4. Step 4: Simplify right side
    568.61x = 251,042.67
  5. Step 5: Solve for x
    x = 251,042.67/568.61
  6. Step 6: Final answer
    x = 441.50

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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.