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Finding the Fourth Proportional to 529.22, 729.88 and 396.75

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Solution

The fourth proportional to 529.22, 729.88 and 396.75 is: 547.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.22 : 729.88 = 396.75 : x
  2. Step 2: Convert to fraction form
    529.22/729.88 = 396.75/x
  3. Step 3: Cross multiply
    529.22x = 729.88 × 396.75
  4. Step 4: Simplify right side
    529.22x = 289,577.91
  5. Step 5: Solve for x
    x = 289,577.91/529.22
  6. Step 6: Final answer
    x = 547.18

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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.