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Finding the Fourth Proportional to 379.88, 567.48 and 318.36

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Solution

The fourth proportional to 379.88, 567.48 and 318.36 is: 475.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.88 : 567.48 = 318.36 : x
  2. Step 2: Convert to fraction form
    379.88/567.48 = 318.36/x
  3. Step 3: Cross multiply
    379.88x = 567.48 × 318.36
  4. Step 4: Simplify right side
    379.88x = 180,662.93
  5. Step 5: Solve for x
    x = 180,662.93/379.88
  6. Step 6: Final answer
    x = 475.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.