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Finding the Fourth Proportional to 528.97, 791.73 and 478.45

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Solution

The fourth proportional to 528.97, 791.73 and 478.45 is: 716.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.97 : 791.73 = 478.45 : x
  2. Step 2: Convert to fraction form
    528.97/791.73 = 478.45/x
  3. Step 3: Cross multiply
    528.97x = 791.73 × 478.45
  4. Step 4: Simplify right side
    528.97x = 378,803.22
  5. Step 5: Solve for x
    x = 378,803.22/528.97
  6. Step 6: Final answer
    x = 716.11

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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.