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Finding the Fourth Proportional to 568.23, 851.61 and 430.86

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Solution

The fourth proportional to 568.23, 851.61 and 430.86 is: 645.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.23 : 851.61 = 430.86 : x
  2. Step 2: Convert to fraction form
    568.23/851.61 = 430.86/x
  3. Step 3: Cross multiply
    568.23x = 851.61 × 430.86
  4. Step 4: Simplify right side
    568.23x = 366,924.68
  5. Step 5: Solve for x
    x = 366,924.68/568.23
  6. Step 6: Final answer
    x = 645.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.