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Finding the Fourth Proportional to 528.53, 729.68 and 351.54

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Solution

The fourth proportional to 528.53, 729.68 and 351.54 is: 485.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.53 : 729.68 = 351.54 : x
  2. Step 2: Convert to fraction form
    528.53/729.68 = 351.54/x
  3. Step 3: Cross multiply
    528.53x = 729.68 × 351.54
  4. Step 4: Simplify right side
    528.53x = 256,509.95
  5. Step 5: Solve for x
    x = 256,509.95/528.53
  6. Step 6: Final answer
    x = 485.33

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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.