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Finding the Fourth Proportional to 385.88, 578.91 and 223.26

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Solution

The fourth proportional to 385.88, 578.91 and 223.26 is: 334.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.88 : 578.91 = 223.26 : x
  2. Step 2: Convert to fraction form
    385.88/578.91 = 223.26/x
  3. Step 3: Cross multiply
    385.88x = 578.91 × 223.26
  4. Step 4: Simplify right side
    385.88x = 129,247.45
  5. Step 5: Solve for x
    x = 129,247.45/385.88
  6. Step 6: Final answer
    x = 334.95

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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.