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Finding the Fourth Proportional to 379.25, 567.86 and 318.50

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Solution

The fourth proportional to 379.25, 567.86 and 318.50 is: 476.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.25 : 567.86 = 318.50 : x
  2. Step 2: Convert to fraction form
    379.25/567.86 = 318.50/x
  3. Step 3: Cross multiply
    379.25x = 567.86 × 318.50
  4. Step 4: Simplify right side
    379.25x = 180,858.98
  5. Step 5: Solve for x
    x = 180,858.98/379.25
  6. Step 6: Final answer
    x = 476.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.