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Finding the Fourth Proportional to 385.26, 528.48 and 375.66

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Solution

The fourth proportional to 385.26, 528.48 and 375.66 is: 515.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.26 : 528.48 = 375.66 : x
  2. Step 2: Convert to fraction form
    385.26/528.48 = 375.66/x
  3. Step 3: Cross multiply
    385.26x = 528.48 × 375.66
  4. Step 4: Simplify right side
    385.26x = 198,528.80
  5. Step 5: Solve for x
    x = 198,528.80/385.26
  6. Step 6: Final answer
    x = 515.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.