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Finding the Fourth Proportional to 528.03, 792.45 and 345.78

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Solution

The fourth proportional to 528.03, 792.45 and 345.78 is: 518.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.03 : 792.45 = 345.78 : x
  2. Step 2: Convert to fraction form
    528.03/792.45 = 345.78/x
  3. Step 3: Cross multiply
    528.03x = 792.45 × 345.78
  4. Step 4: Simplify right side
    528.03x = 274,013.36
  5. Step 5: Solve for x
    x = 274,013.36/528.03
  6. Step 6: Final answer
    x = 518.94

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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.