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Finding the Fourth Proportional to 572.12, 789.28 and 365

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Solution

The fourth proportional to 572.12, 789.28 and 365 is: 503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.12 : 789.28 = 365 : x
  2. Step 2: Convert to fraction form
    572.12/789.28 = 365/x
  3. Step 3: Cross multiply
    572.12x = 789.28 × 365
  4. Step 4: Simplify right side
    572.12x = 288,087.20
  5. Step 5: Solve for x
    x = 288,087.20/572.12
  6. Step 6: Final answer
    x = 503.54

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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.