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Finding the Fourth Proportional to 411.30, 567.62 and 386.36

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Solution

The fourth proportional to 411.30, 567.62 and 386.36 is: 533.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.30 : 567.62 = 386.36 : x
  2. Step 2: Convert to fraction form
    411.30/567.62 = 386.36/x
  3. Step 3: Cross multiply
    411.30x = 567.62 × 386.36
  4. Step 4: Simplify right side
    411.30x = 219,305.66
  5. Step 5: Solve for x
    x = 219,305.66/411.30
  6. Step 6: Final answer
    x = 533.20

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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.