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Finding the Fourth Proportional to 528.98, 792.56 and 285.68

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Solution

The fourth proportional to 528.98, 792.56 and 285.68 is: 428.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.98 : 792.56 = 285.68 : x
  2. Step 2: Convert to fraction form
    528.98/792.56 = 285.68/x
  3. Step 3: Cross multiply
    528.98x = 792.56 × 285.68
  4. Step 4: Simplify right side
    528.98x = 226,413.15
  5. Step 5: Solve for x
    x = 226,413.15/528.98
  6. Step 6: Final answer
    x = 428.02

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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.