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Finding the Fourth Proportional to 411.66, 567.99 and 287.82

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Solution

The fourth proportional to 411.66, 567.99 and 287.82 is: 397.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.66 : 567.99 = 287.82 : x
  2. Step 2: Convert to fraction form
    411.66/567.99 = 287.82/x
  3. Step 3: Cross multiply
    411.66x = 567.99 × 287.82
  4. Step 4: Simplify right side
    411.66x = 163,478.88
  5. Step 5: Solve for x
    x = 163,478.88/411.66
  6. Step 6: Final answer
    x = 397.12

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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.