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Finding the Fourth Proportional to 572.23, 789.69 and 310.25

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Solution

The fourth proportional to 572.23, 789.69 and 310.25 is: 428.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.23 : 789.69 = 310.25 : x
  2. Step 2: Convert to fraction form
    572.23/789.69 = 310.25/x
  3. Step 3: Cross multiply
    572.23x = 789.69 × 310.25
  4. Step 4: Simplify right side
    572.23x = 245,000.55
  5. Step 5: Solve for x
    x = 245,000.55/572.23
  6. Step 6: Final answer
    x = 428.15

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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.