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Finding the Fourth Proportional to 385.26, 531.89 and 343.35

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Solution

The fourth proportional to 385.26, 531.89 and 343.35 is: 474.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.26 : 531.89 = 343.35 : x
  2. Step 2: Convert to fraction form
    385.26/531.89 = 343.35/x
  3. Step 3: Cross multiply
    385.26x = 531.89 × 343.35
  4. Step 4: Simplify right side
    385.26x = 182,622.71
  5. Step 5: Solve for x
    x = 182,622.71/385.26
  6. Step 6: Final answer
    x = 474.02

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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.