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Finding the Fourth Proportional to 619.28, 928.38 and 345.50

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Solution

The fourth proportional to 619.28, 928.38 and 345.50 is: 517.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.28 : 928.38 = 345.50 : x
  2. Step 2: Convert to fraction form
    619.28/928.38 = 345.50/x
  3. Step 3: Cross multiply
    619.28x = 928.38 × 345.50
  4. Step 4: Simplify right side
    619.28x = 320,755.29
  5. Step 5: Solve for x
    x = 320,755.29/619.28
  6. Step 6: Final answer
    x = 517.95

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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.