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Finding the Fourth Proportional to 528.69, 791.73 and 345.90

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Solution

The fourth proportional to 528.69, 791.73 and 345.90 is: 518.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.69 : 791.73 = 345.90 : x
  2. Step 2: Convert to fraction form
    528.69/791.73 = 345.90/x
  3. Step 3: Cross multiply
    528.69x = 791.73 × 345.90
  4. Step 4: Simplify right side
    528.69x = 273,859.41
  5. Step 5: Solve for x
    x = 273,859.41/528.69
  6. Step 6: Final answer
    x = 518.00

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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.