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Finding the Fourth Proportional to 528.90, 729.36 and 379.27

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Solution

The fourth proportional to 528.90, 729.36 and 379.27 is: 523.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.90 : 729.36 = 379.27 : x
  2. Step 2: Convert to fraction form
    528.90/729.36 = 379.27/x
  3. Step 3: Cross multiply
    528.90x = 729.36 × 379.27
  4. Step 4: Simplify right side
    528.90x = 276,619.26
  5. Step 5: Solve for x
    x = 276,619.26/528.90
  6. Step 6: Final answer
    x = 523.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.