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Finding the Fourth Proportional to 528.72, 729.39 and 342.27

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Solution

The fourth proportional to 528.72, 729.39 and 342.27 is: 472.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.72 : 729.39 = 342.27 : x
  2. Step 2: Convert to fraction form
    528.72/729.39 = 342.27/x
  3. Step 3: Cross multiply
    528.72x = 729.39 × 342.27
  4. Step 4: Simplify right side
    528.72x = 249,644.66
  5. Step 5: Solve for x
    x = 249,644.66/528.72
  6. Step 6: Final answer
    x = 472.17

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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.