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Finding the Fourth Proportional to 528.76, 792.76 and 281.80

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Solution

The fourth proportional to 528.76, 792.76 and 281.80 is: 422.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.76 : 792.76 = 281.80 : x
  2. Step 2: Convert to fraction form
    528.76/792.76 = 281.80/x
  3. Step 3: Cross multiply
    528.76x = 792.76 × 281.80
  4. Step 4: Simplify right side
    528.76x = 223,399.77
  5. Step 5: Solve for x
    x = 223,399.77/528.76
  6. Step 6: Final answer
    x = 422.50

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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.