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Finding the Fourth Proportional to 411.90, 567.86 and 301.38

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Solution

The fourth proportional to 411.90, 567.86 and 301.38 is: 415.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.90 : 567.86 = 301.38 : x
  2. Step 2: Convert to fraction form
    411.90/567.86 = 301.38/x
  3. Step 3: Cross multiply
    411.90x = 567.86 × 301.38
  4. Step 4: Simplify right side
    411.90x = 171,141.65
  5. Step 5: Solve for x
    x = 171,141.65/411.90
  6. Step 6: Final answer
    x = 415.49

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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.