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Finding the Fourth Proportional to 385.14, 531.68 and 245.33

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Solution

The fourth proportional to 385.14, 531.68 and 245.33 is: 338.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.14 : 531.68 = 245.33 : x
  2. Step 2: Convert to fraction form
    385.14/531.68 = 245.33/x
  3. Step 3: Cross multiply
    385.14x = 531.68 × 245.33
  4. Step 4: Simplify right side
    385.14x = 130,433.17
  5. Step 5: Solve for x
    x = 130,433.17/385.14
  6. Step 6: Final answer
    x = 338.66

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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.