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Finding the Fourth Proportional to 619.20, 928.98 and 254.07

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Solution

The fourth proportional to 619.20, 928.98 and 254.07 is: 381.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.20 : 928.98 = 254.07 : x
  2. Step 2: Convert to fraction form
    619.20/928.98 = 254.07/x
  3. Step 3: Cross multiply
    619.20x = 928.98 × 254.07
  4. Step 4: Simplify right side
    619.20x = 236,025.95
  5. Step 5: Solve for x
    x = 236,025.95/619.20
  6. Step 6: Final answer
    x = 381.18

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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.