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Finding the Fourth Proportional to 345.94, 517.66 and 254.40

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Solution

The fourth proportional to 345.94, 517.66 and 254.40 is: 380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.94 : 517.66 = 254.40 : x
  2. Step 2: Convert to fraction form
    345.94/517.66 = 254.40/x
  3. Step 3: Cross multiply
    345.94x = 517.66 × 254.40
  4. Step 4: Simplify right side
    345.94x = 131,692.70
  5. Step 5: Solve for x
    x = 131,692.70/345.94
  6. Step 6: Final answer
    x = 380.68

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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.