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Finding the Fourth Proportional to 385.25, 531.65 and 247.25

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Solution

The fourth proportional to 385.25, 531.65 and 247.25 is: 341.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.25 : 531.65 = 247.25 : x
  2. Step 2: Convert to fraction form
    385.25/531.65 = 247.25/x
  3. Step 3: Cross multiply
    385.25x = 531.65 × 247.25
  4. Step 4: Simplify right side
    385.25x = 131,449.23
  5. Step 5: Solve for x
    x = 131,449.23/385.25
  6. Step 6: Final answer
    x = 341.21

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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.