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Finding the Fourth Proportional to 528.50, 729.06 and 397.46

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Solution

The fourth proportional to 528.50, 729.06 and 397.46 is: 548.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.50 : 729.06 = 397.46 : x
  2. Step 2: Convert to fraction form
    528.50/729.06 = 397.46/x
  3. Step 3: Cross multiply
    528.50x = 729.06 × 397.46
  4. Step 4: Simplify right side
    528.50x = 289,772.19
  5. Step 5: Solve for x
    x = 289,772.19/528.50
  6. Step 6: Final answer
    x = 548.29

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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.