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Finding the Fourth Proportional to 411.82, 567.47 and 386.30

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Solution

The fourth proportional to 411.82, 567.47 and 386.30 is: 532.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.82 : 567.47 = 386.30 : x
  2. Step 2: Convert to fraction form
    411.82/567.47 = 386.30/x
  3. Step 3: Cross multiply
    411.82x = 567.47 × 386.30
  4. Step 4: Simplify right side
    411.82x = 219,216.05
  5. Step 5: Solve for x
    x = 219,216.05/411.82
  6. Step 6: Final answer
    x = 532.31

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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.