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Finding the Fourth Proportional to 569.19, 851.49 and 422.85

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Solution

The fourth proportional to 569.19, 851.49 and 422.85 is: 632.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.19 : 851.49 = 422.85 : x
  2. Step 2: Convert to fraction form
    569.19/851.49 = 422.85/x
  3. Step 3: Cross multiply
    569.19x = 851.49 × 422.85
  4. Step 4: Simplify right side
    569.19x = 360,052.55
  5. Step 5: Solve for x
    x = 360,052.55/569.19
  6. Step 6: Final answer
    x = 632.57

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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.