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Finding the Fourth Proportional to 608.31, 838.89 and 528.66

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Solution

The fourth proportional to 608.31, 838.89 and 528.66 is: 729.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.31 : 838.89 = 528.66 : x
  2. Step 2: Convert to fraction form
    608.31/838.89 = 528.66/x
  3. Step 3: Cross multiply
    608.31x = 838.89 × 528.66
  4. Step 4: Simplify right side
    608.31x = 443,487.59
  5. Step 5: Solve for x
    x = 443,487.59/608.31
  6. Step 6: Final answer
    x = 729.05

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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.