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Finding the Fourth Proportional to 572.25, 789.72 and 310.27

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Solution

The fourth proportional to 572.25, 789.72 and 310.27 is: 428.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.25 : 789.72 = 310.27 : x
  2. Step 2: Convert to fraction form
    572.25/789.72 = 310.27/x
  3. Step 3: Cross multiply
    572.25x = 789.72 × 310.27
  4. Step 4: Simplify right side
    572.25x = 245,024.87
  5. Step 5: Solve for x
    x = 245,024.87/572.25
  6. Step 6: Final answer
    x = 428.18

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Similar ratio
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1.5x scale

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.