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Finding the Fourth Proportional to 568.57, 851.20 and 432.15

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Solution

The fourth proportional to 568.57, 851.20 and 432.15 is: 646.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.57 : 851.20 = 432.15 : x
  2. Step 2: Convert to fraction form
    568.57/851.20 = 432.15/x
  3. Step 3: Cross multiply
    568.57x = 851.20 × 432.15
  4. Step 4: Simplify right side
    568.57x = 367,846.08
  5. Step 5: Solve for x
    x = 367,846.08/568.57
  6. Step 6: Final answer
    x = 646.97

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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.