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Finding the Fourth Proportional to 528.51, 791.75 and 474.86

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Solution

The fourth proportional to 528.51, 791.75 and 474.86 is: 711.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.51 : 791.75 = 474.86 : x
  2. Step 2: Convert to fraction form
    528.51/791.75 = 474.86/x
  3. Step 3: Cross multiply
    528.51x = 791.75 × 474.86
  4. Step 4: Simplify right side
    528.51x = 375,964.07
  5. Step 5: Solve for x
    x = 375,964.07/528.51
  6. Step 6: Final answer
    x = 711.37

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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.